Sunlight and Your Health: An EnLIGHTening Perspective

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  • Опубліковано 6 січ 2015
  • (0:45 - Main Presentation) Michael F. Holick, PhD MD, Boston University Medical Center gives an energetic talk on the positive impacts of sunlight on your health. How can we balance current thinking on the negative effects of sun exposure with new research on its benefits? How does sunlight help in the production of vitamin D? Join Dr. Holick as he explains how sunlight reaches us, how it is absorbed by the skin and much more. Recorded on 12/09/2014. [2/2015] [Show ID: 29075]
    Vitamin D for Public Health - Integrating Sunshine, Supplements and Measurement for Optimal Health 2014
    (www.uctv.tv/vitamin-d-public-...)
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КОМЕНТАРІ • 271

  • @rroulette2660
    @rroulette2660 4 роки тому +97

    Everything in moderation.Common sense people, I never believed the AMA ! I've lived worked and played in the sun for most of my life. I'm from Florida. I grew up on the beach. I've worked a cattle ranch most of my life . The sun is part of our health

    • @vincentgadson4304
      @vincentgadson4304 Рік тому +1

      Great information. 😊

    • @no22sill
      @no22sill 11 місяців тому +1

      Sun is important for our sanity too

  • @lile5341
    @lile5341 4 роки тому +32

    Amazing that so much benefit can derive from something as free as the sun. Especially in this pandemic. The answer is here in mother nature all along and most of it free

  • @ebenburger111
    @ebenburger111 4 роки тому +7

    Bro Holick, I might not agree with you regarding your theory of evolution, but I highly respect you. I bought your book and it will forever change my life and that of my kids. I take my 3 boys out of the house, shirts off and make sure the 4 of us get at least 10 min of quality sunlight 3 times a week. My youngest boys 5 yrs old) is already bubbling over with energy and he says that the sun is his 'Happy Vitamin'. Bro Holick, thank you for everything that you've done. Thank you for being brave in spite of all the opposition. Thank you for Loving and fighting for mankind. I pray God's richest blessing apon you and your family. You're my hero. I so wish that I too can impact as many lives for the good as you do... Your book is deffinately one of the most inspiring books on my list yet... Bless u....
    Eben.

  • @flaviogutierrez-willer5248
    @flaviogutierrez-willer5248 4 роки тому +63

    This knoledge on vitamin D is special important now, to enhace our inmune system with COVD_19 pandemia

    • @chazgurrero3090
      @chazgurrero3090 4 роки тому +6

      I live in San Diego. Yesterday I took a nap for 3 hours felt so good from the sun in sure I've got more of a dose of vitamin D. Have a great day.😜😜😜

    • @katiie7
      @katiie7 4 роки тому +3

      Too bad us in Canada are stuck with no uva/uvb till april and even then not adequate levels. Cannot wait to go south.

    • @flaviogutierrez-willer5248
      @flaviogutierrez-willer5248 4 роки тому

      @@katiie7 You may tray in pills.more than 600 units per day in regular way

    • @Germatti13489
      @Germatti13489 4 роки тому

      @Mambo Jambo Actually there is...you should take two to three vitamin D3 everyday if You're Not Innocent me location. Ir you are deficient, which most people are, it helps with sleep, depression, and fatigue.

    • @dana102083
      @dana102083 4 роки тому +3

      @@Germatti13489 2 to 3 of what dose? 400 iu or 1000 iu.. I take 2000-3000iu in summer and 5-6000 iu through winter for this Canadian that cant get out much due to health.

  • @francoisBonin-phils
    @francoisBonin-phils Рік тому +6

    Imagin how God who created us is a Genius!

  • @veg
    @veg 8 років тому +116

    Vitamin D gave me my health back ♥

    • @Test7017
      @Test7017 7 років тому +2

      what was wrong with you? and how much time did you spend in Sun

    • @xantonify
      @xantonify 7 років тому +28

      Same. I was so tired i couldn't sleep, i had insomnia. I could barely walk because i was dizzy and nerly started fainting. Vitamin d3 and k2 combo did cure my health issues totally.

    • @sagek7949
      @sagek7949 5 років тому +3

      Thanks for sharing🙏🏼 inspired me!

    • @mac2brown
      @mac2brown 4 роки тому

      @@xantonify how much did you take?

    • @xantonify
      @xantonify 4 роки тому +4

      @@mac2brown I took 25 000 iu for a few months then i take 10 000 iu d3 daily for maintaining my levels.

  • @davidwho7847
    @davidwho7847 2 роки тому +5

    Few videos have me glued to my computer screen, but this one did! Thank you for posting this.

  • @Bobby-hn3cu
    @Bobby-hn3cu 7 місяців тому +1

    Texted positive for Covid late summer 2022. After a week of severe symptoms i decided to sit under the sun one afternoon to help warm me up. 45 minutes later I went to bed and woke up energized. I still tested positive for another week but all my symptoms were gone. Weather was above 70 degrees.

  • @MB031
    @MB031 8 років тому +20

    Brilliant research and information !! Thank you so much for sharing this with us.

  • @MariettaFarley
    @MariettaFarley 4 роки тому +3

    Love these Dr Holick vids. So much fun!

  • @chrisweidner2617
    @chrisweidner2617 4 роки тому +9

    14 years in the sun in Vietnam. Heaven. Now one winter in the Midwest. Hell.

  • @gudmundurrafngeirdalbragas1513
    @gudmundurrafngeirdalbragas1513 6 років тому +27

    What a wealth of info packed into one lecture plus with all this humor included. I liked especially when the doctor showed his barren chest on two occasions. :)

  • @alexandrosvassaras4302
    @alexandrosvassaras4302 4 роки тому +3

    Amazing Dr Holick ! ;) i must have seen this lecture as many times as Braveheart ! Dakujeme pan profesor !

  • @engin7787
    @engin7787 Рік тому +1

    I love every word you said. It is worth gold, it is exiting, it arms us to protect from evil conspiracy to the humanity!

  • @alanw7134
    @alanw7134 4 роки тому +1

    Wonderful presentation.

  • @eugeneesguerra3420
    @eugeneesguerra3420 2 місяці тому +3

    Im from philippines where we have sun all year round and we cannot avoid sun exposure and inspite of this skin cancer is almost unknown.

  • @tybalttybalt
    @tybalttybalt 4 роки тому

    That letter broke my heart

  • @jamesallan1883
    @jamesallan1883 Рік тому +1

    U of C doesn't post these types of talks now. Too bad they we're evidence based and of great value and benefit to all.

  • @DaviddeBoisblanc
    @DaviddeBoisblanc 8 років тому +2

    Very good overview.

  • @kenishahammond3935
    @kenishahammond3935 4 роки тому +4

    I love my melanin! Excellent information!

  • @glacialimpala
    @glacialimpala 3 роки тому +5

    19:25 To deny that we belong in the Sun, at least a part of the day, is to deny evolution.

  • @AydaWalsh
    @AydaWalsh 4 роки тому +5

    Excellent and informative presentation! I would be curious to see any impact on the sun through the eyes as well and how the combination would make a difference - THANK YOU!

  • @neptronix
    @neptronix 8 років тому +1

    Most excellent! than you for posting this!

  • @dianetonacia2122
    @dianetonacia2122 4 роки тому +1

    Wow awesome
    Best yet info thankyou

  • @lincolnthinking
    @lincolnthinking 4 роки тому +3

    absolutely, get yourself some sensible exposure to the free sunshine ~

  • @tanganman
    @tanganman 9 років тому +34

    What an informative and well-paced presentation! Well worth watching. I need to check my D level soon.

    • @bethsabath
      @bethsabath 2 роки тому +1

      My level is 87 in my blood test.

    • @oscarholley891
      @oscarholley891 2 роки тому +1

      Don't check it until next year because me and my ppl will submit the hidden affect of the moon on vitamin D and the moon's affect on excessively hairy ppl in certain areas of the world where the moon's rays are not clouded by pollution

  • @Presidentenumerouno
    @Presidentenumerouno 29 днів тому

    Great presentation, the slides help...

  • @terryritchie6148
    @terryritchie6148 4 роки тому +1

    Brilliant 😊

  • @Elena-un7rr
    @Elena-un7rr 6 років тому +35

    My story of Vitamin D and recovery: "A Lifetime of Misdiagnosis: Triumph Over Illness" by Eva Cardoza King

  • @thejerryj
    @thejerryj 8 років тому +13

    Thank you for another sterling presentation Dr. Holick. I understand that it is crucial to set the ratio of D3 and K2 at 10 to 1. I have been given to believe that vitamin A was an important part of supporting this "Dynamic Duo" in the healing wonders they work. Can you give me some insight into the ratios between these vitamins to allow then to work their best together?Thank you, for your time and effort in sharing your knowledge and understanding.

  • @kryptonegalaxy3004
    @kryptonegalaxy3004 Рік тому

    thank u so much...!

  • @richardmarkiewicz3274
    @richardmarkiewicz3274 4 роки тому +4

    The.most educated lecture I ever listen to. Big Thanks

  • @lile5341
    @lile5341 4 роки тому +17

    Vit D from the sun last twice as long in the body as Vit D supplement

    • @dlarge6502
      @dlarge6502 4 роки тому +10

      Thats because a suppliment gives you a tiny amount, 1000 IU. Half an hour in the correct sun (where there is UVB) looks to generate around 10,000 IU.
      The liver then converts this into a form that can last up to 3 weeks in the blood and is converted as needed by the kidneys into the active form of "Vitamin D"
      Where I live it is very hard to get UVB. In the UK UVB is only available during half of the year and only for around 2 hours a day while the sun is high enough. There is 0 UVB in winter here. None. Yet nobody is telling anyone to take the supplements! Even though they are only 1000 IU. As "Vitamin D" is not in the diet in significant amounts, the supplements should practically be posted through your door by the NHS to stop you getting so ill during winter.

    • @glynthomas3976
      @glynthomas3976 4 роки тому +1

      dlarge6502 👏

    • @karoo_bushman6880
      @karoo_bushman6880 3 роки тому +2

      @@dlarge6502 Hear! Hear!

  • @douglasthompson2740
    @douglasthompson2740 4 роки тому +3

    PS: How much UVA is in reflected sunlight such as snow or on the ocean (water)? Potency in the reflected compared to the direct, also amount in combined?

  • @dougdelt
    @dougdelt 4 роки тому +8

    Get the iOS app dminder. I use it every day. It allows you to press a button and it will tell you from your geographic location, and your self reporting of the cloud cover, how much vitamin D you’re getting per minute. And by the end of your time in the sun, you will have a total computed in international units. Also the dminder tells you exactly when is the right time to go out in the sun and when it will not be effective. It shows you on a arc where the sun becomes available in your area. Every morning I use this to calculate what is the approximate time I will go out to try to get about 25 minutes of sunshine. And as he says in the video, the effect of sunshine is last 2 to 3 times longer than the same international units in a pill.

  • @777videos7777
    @777videos7777 3 роки тому +3

    One thing he wasn't explicit about and should have been was the vast discrepancy between Black and White rates of normal levels of Vitamin D levels in the US and the amount of time it would take to reach 60 ng/l.
    According to his graph it should actually take African Americans 10-20 times longer to reach 60 ng/, which would equate to having to be exposed at least a couple of hours per day of sunlight compared to the minimum recommendation of 15-20 minutes for Caucasians.
    This has vast implications, especially with regard to Covid-19 cases, of which 30% or more are attributed to African Americans. I wish that experts like himself and others would make recommended sunlight exposure times more clear, because saying the sun can cure all these other ailments then further exposes the health disparities in the Black community which isn't hardly being addressed at a basic level.

  • @claudiokabanata3325
    @claudiokabanata3325 5 років тому +8

    Sunlight alleviates my palpitations

    • @thisbullrocks6030
      @thisbullrocks6030 4 роки тому +2

      just take it in small doses and build up your strength to it - man as well as all animal and plant life was meant to live with the sun

  • @MrMichaelkarp
    @MrMichaelkarp 4 роки тому +7

    In the winter where I live, I cannot get sufficient exposure to the sun. So, I have the following questions about in-home UVB sunlamps: efficacy, safety and wise usage. This is information I cannot seem to find.

    • @mac2brown
      @mac2brown 4 роки тому

      Im interested in what you have since found on the subject.

    • @kathleenmurphy2379
      @kathleenmurphy2379 4 роки тому +3

      And one of his other lecturers I believe it's called the delightful vitamin D or something like that that's here on UA-cam he talks about a lady who had terrible bone pain and she went to tanning beds look up the other video about him.

    • @mac2brown
      @mac2brown 4 роки тому +1

      It all reminds of the happy lights used in Alaska.

  • @skarz2011
    @skarz2011 7 років тому +5

    Indeeeeeed

  • @lyngaspar8545
    @lyngaspar8545 4 роки тому

    Thank you for the information. It helps a lot. God bless🙏

  • @pavlossideris3973
    @pavlossideris3973 4 роки тому +2

    I try not to use artificial supplements - therefore is there food that would give me sufficient dosage of vit d ? In the lecture mushrooms are recoomended and google also mentions fatty fish etc... Would food on its own provide me with adequate vit d or do you think that supplementation is a must ? Thanks !!!

    • @taliatut
      @taliatut 4 роки тому +1

      Pavlos Sideris pastured lard has the highest levels of D. You may still need a supplement to bring the levels up first (lab test needed to check that) and you need the sun in any case to activate the vitamin.

  • @chuyruiz14
    @chuyruiz14 4 роки тому

    & the most important to me is how long en I suppose to do it??

  • @1aliveandwell
    @1aliveandwell 3 роки тому +1

    Can you make too much vite from sun lamps? Can we sun or sun lamp our food is it just yeast or certain food types (I grow some food, apples, collards... ? ) If make less melanin (maybe nutrient defic) will have less vite D made in skin? So any skin, face, arms, torso legs all same amount? sorry for all the questions, just very interesting. Heard DrGominak say primitive yeast used to make vite D2, wonder if still does. labs for 25H D and but what about active for 1,25oh? Someone told me he had low D lab but later tested active form and was high(had sarcodosis(?). What if already have low BP would sunlight make worse or only if need lowerBP.

  • @chuyruiz14
    @chuyruiz14 4 роки тому +4

    In North America & South America when is the best time to sit out in the sun 🌞 ??? What time of the day ?? I normally sit out when the sun is rising... or setting....

    • @elsagrace3893
      @elsagrace3893 4 роки тому +4

      For max Viamin D noon time is best to 2 hour before and 2 hours after

    • @joncunningham9925
      @joncunningham9925 4 роки тому +5

      All day long! Whenever the SUN shines get out into it.
      Fishermen fishing all day long are the healthiest people on earth.
      IMHBPO

  • @MrApplewine
    @MrApplewine 7 років тому +6

    What if you only get UVB like with a UVB lamp? I was going to order one, but now I'm wondering if I need the whole spectrum, which I can't get with a simple solution from an artificial lamp.

    • @z.deutch1334
      @z.deutch1334 6 років тому +3

      You don't need the whole spectrum. UVA rays are damaging so that's one EMR you don't want extra exposure to. Get a UVB lamp or take vitamin D3, and get a Near Infrared (NIR) lamp - the sun emits infrared and the near wavelength is highly beneficial to the skin and body. He mentioned that exposure to the sun increases nitric oxide, well that comes from the sun's near infrared range.

    • @rist98
      @rist98 6 років тому +1

      UVB is the only part of the spectrum that we don't get in our artificial environments, that we would get from the sun. All others, UVA, Visible light, Infrared. All of it, we have plenty of, in out artificial environments. Its the UVB that is lacking.

    • @karoo_bushman6880
      @karoo_bushman6880 3 роки тому +3

      Check the 'Osram Ultra Vitalux 300W' lightbulb, it has almost the full spectrum of sunlight. Ancient technology, now forbidden by 'Big Sunscreen'. I measured the output with a VEML6075 sensor and found it to output 27% UVB, the rest of UV energy ist UVA (zero UVC) and then very bright white light so you automatically squint when looking at it. I think it's as close to equatorial 12 'o'clock sunlight as possible. I didn't measure NIR or IR output but suspect not much, so for that you'd need one of those 660nm + 850nm LED arrays (which I also got). We use it during the winter, it significantly increases our mood and sleep quality (my sleep tracker says 8 hours and 3 hours of deep sleep every night, my wife even 4h deep). All my aches are gone. My blood pressure has dropped. I have more energy during the day. No seasonal flus/colds. VitD levels high, no supps needed. Can imagine more benefits but those are the ones we noticed. Great long lasting tan as well. We hang two of those bulbs 70cm away from our full naked body over the bed, one for upper body and one for lower body. We use microphone stands to get them that high up and you can move them around too. We do a 3-4 minutes front and then 3-4 minutes back. Start with one minute, check if you get red, then increase a minute every day. You should get a tan but not a burn, then you're getting enough. You can also just use one bulb, but then your legs will not get the preparation and protection for summer. Best would be a whole array and then more distance (1-1.5meter) so you get more even exposure, but this would mean more electricity used, so we use only two and move around a bit (turn face etc.) to get more spread out exposure. The 660nm + 850nm NIR/IR LED panels have proven to increase Collagen and repair damage from sunlight in the skin, we include this (red light therapy) to mitigate the detrimental effects of UVR on skin. All in all it's like living in the tropics and feeling good year round, yet scientifically administered and hopefully because no burn no cancer and because NIR/IR no wrinkles or spots. That's what science says anyway.

  • @Germatti13489
    @Germatti13489 4 роки тому

    I had a sunlamp in 1972, put baby oil on both my lower legs, clipped the sun lamp to the back of a chair, and put my legs up on the seat but forgot to set a timer. Once I begin reading I forgot all about my legs... for about an hour. The next morning, I knew it was bad, I had long blisters on the front of each leg and ended up with second and third degree burns.

    • @dlarge6502
      @dlarge6502 4 роки тому +1

      Yes that would happen when people do silly things with UV

  • @phsutariya
    @phsutariya 2 роки тому +1

    In Western India Gujarat State how much sun light exposure is required to produce enough Vit D.Thanks

  • @jermainedawson7862
    @jermainedawson7862 2 роки тому

    Show to us those who fortunate to have sunlight, and those who are unfortunate

  • @bluehairkim1
    @bluehairkim1 3 роки тому +1

    Do red light panels produce any vitamin d?

  • @willywonka077
    @willywonka077 4 роки тому +4

    Very good video but the only thing is the one question that most people want to know is sunlight a cumulative and other words can I get sunlight today and get a whole lot of sunlight exposure for today and then the next 4 days not have any sunlight will that one day of many hours of sunlight be a cumulative to last for the rest of the week ....in other words can your body store vitamin D ?

  • @eerbatsirk
    @eerbatsirk 4 роки тому +4

    I heard that we only get UVA sunrays through windows, and blocks the UVB from coming through, which causes damage to our skin. But now it sounds like our skin is reacting to the imbalance of only getting UVA and making the protective melanosomes deeper in our dermis so it isn't protecting us from UVB rays from entering at the top layer, epidermis. Is that correct?
    I thought UVB, is the beneficial rays that makes vitamin D, so it wouldn't be causing damage. What does too mutch UVB do?

    • @joncunningham9925
      @joncunningham9925 4 роки тому +4

      We need the SUN just as God gave it to us. Living in a Big house and looking out will kill us. We need to be outside the house and live as they did many moons ago or quickly die . IMBPHO

    • @PrincessTala83
      @PrincessTala83 10 місяців тому

      Too much UVB burns your skin

  • @VivRob
    @VivRob 4 роки тому +3

    What type sunscreen should I use when I am getting sun during the 10am to 3pm? I’ve heard some of the components of sunscreen are bad for you and they go through your skin and into your bloodstream. Is that true?

    • @technojunkindatrunk
      @technojunkindatrunk 3 роки тому +4

      Yes, it’s true. Sunscreen is NOT good for us....they put s-- in it to cause skin cancer. All designed to keep you out of the sun... and sick.

    • @surfershaper
      @surfershaper 3 роки тому +1

      Mineral based with zinc

    • @kostaborojevic498
      @kostaborojevic498 Рік тому

      Just cover your face with a hat.

  • @ilanadoc9873
    @ilanadoc9873 7 років тому +2

    So, If I am exosed to direct sun at noon in the summer , do I get 20'00 IU in an hour ?
    (assuming my skin is not dark and not very white ) ?

    • @thisbullrocks6030
      @thisbullrocks6030 6 років тому

      you will get that in about 20 mins - even more in an hour

    • @Noor-jw2tn
      @Noor-jw2tn 4 роки тому

      @@thisbullrocks6030 Blue light is strongest at noon. Better to expose before 10am and after 2 or 3 pm. These times will give you a full spectrum

    • @TheUtuber999
      @TheUtuber999 4 роки тому +5

      @@Noor-jw2tn Before 10 am and after 2 pm, the ratio of UV-A exposure is much higher relative to UV-B exposure. You are better off sunbathing between 10 am and 2 pm, when the sun is higher in the sky and there is less atmosphere to impede UV-B rays.

    • @Noor-jw2tn
      @Noor-jw2tn 4 роки тому +2

      @@TheUtuber999 between 10 and 2pm is best to get full exposure. You only need 15 minutes per day. You will not burn. Before that time is for different reasons. More for energy and allowing light into your eye gate without the blue light.

  • @eerbatsirk
    @eerbatsirk 4 роки тому +6

    His comment about a statin not effecting cholesterol synthesis in the skin is interesting. But just to be clear, Statins do negatively effect cholesterol in our bodies. Cholesterol LDL and HDL are protective. But you want high HDL and high LDL, And triglycerides to HDL ratio you want less than one. It's the best predictor of cardio vascular risk and insulin sensitivity.
    People who live longest have higher LDL cholesterol. Cholesterol, "plaque" in arteries is blamed for the cause of the inflammation and block. It is at the sight of the inflammation, too help repare, acting as a band aid.
    It's insulin resistance from sugar and excessive carbohydrates, and bad oils (PUFA's) in our western diet that causes heart disease, cancer, diabetes, and autoimmune disease.
    Red meat and saturated fat and cholesterol is not to blame.

    • @serendipify
      @serendipify 4 роки тому +1

      Krista Zurawski You have it exactly backwards. It’s the animal protein and fats that cause heart disease and cancer and diabetes. The science is very clear and overwhelming. Check out Dr. T. Colin Campbell, Dr. Michael Greger, Dr. Esselstyn, Dr. Neal Barnard and others for a preponderance of real science on this. Be well

    • @eerbatsirk
      @eerbatsirk 4 роки тому +4

      @@serendipify Cholesterol LDL and HDL are protective. But you want high HDL and high LDL, And triglycerides to HDL ratio you want less than one. It's the best predictor of cardio vascular risk and insulin sensitivity.
      It's insulin resistance from sugar and excessive carbohydrates, and bad oils (PUFA's) in our western diet that causes heart disease, cancer, diabetes, and autoimmune disease. Listen to Fundamental Health with Paul Saladino, look up Dave Feldman's Cholesterol Code. It will blow your mind! We've been lied to from bad epidemiology bad studies, ever since Ancel Keys false Seven Countries Study! Where he purposely left out countries, like France that eat red meat and saturated fats with little to no heart diseases, that didn't back up his hypothesis.

  • @marykelly6929
    @marykelly6929 3 роки тому

    I have vitaligo so can’t take sun.Advice please

  • @yallaworld1575
    @yallaworld1575 4 роки тому

    How to I join

  • @thetrillianaire
    @thetrillianaire 3 роки тому +1

    now this is a man who knows how to have some fun with a slideshow

  • @truedrew11thed5
    @truedrew11thed5 5 років тому +3

    So dope

  • @doletawood5061
    @doletawood5061 4 роки тому

    How do I know if a tanning booth is lying about full spectrum light? I'd like to try tanning.

    • @joncunningham9925
      @joncunningham9925 4 роки тому

      Get in the SUN and if you are in an area where you never see the sun, then move to where the SUN still shines. Only the SUN will heal you. Pills cannot replace Natural Light! IMBPO

    • @mac2brown
      @mac2brown 4 роки тому

      @@joncunningham9925 where does it shine!!! Im in cali and brr!

    • @joncunningham9925
      @joncunningham9925 4 роки тому

      @@mac2brown YES frigid everywhere. Actually in west Texas. South America and the whole world is very cold now but this summer it will be hot in the USA and cold everywhere else. Israel also gets lots of sunshine. We're headed for a global Ice Age except for the United States this summer. They will cause heat and rain to stop the farmers planting. You watch. Stay warm and get as much of Sun's Vit.D as possible to stay healthy ! IMO!

  • @elhadjzeze3118
    @elhadjzeze3118 7 років тому +1

    I have a problem :when I am in the morning spend half of my memory and at night I be on the full concentration ,and the strength of my memory. and i'discovered that the sunlight is the reason and i'was traveled to a place with clouds returned my memory again.what is the solution for this problem or any research on this matter I suffer so much it is difficult for me Thanks for hellp.

  • @patricke8627
    @patricke8627 4 роки тому +1

    Skip to 24:30 PRICELESS

  • @linhphan6508
    @linhphan6508 9 місяців тому +4

    🎯 Key Takeaways for quick navigation:
    00:45 👨‍🔬 Holick introduces himself and the topic of the positive health impacts of sunlight.
    01:13 💡 Sunlight affects skin through its radiation, not heat. Skin pigment protects against sun damage.
    02:46 ⚠️ Excessive sun exposure increases skin cancer risk. UV damages elastic tissue, causing wrinkling.
    04:07 🔬 UVB makes vitamin D in skin. Visible light penetrates deeply. UV effects depend on wavelength.
    08:29 🛡️ Melanin protects skin like an umbrella over cell nuclei. Tanning is the body's natural sunscreen.
    12:38 📈 Sunlight treatments were popular until antibiotics and pharmacology took over in 1940s.
    19:43 💊 Diet/food can't provide enough vitamin D. Sun exposure is the best natural source.
    29:23 🧑🏿‍🤝‍🧑🏻 Darker skin needs 5-10x more sun exposure to produce adequate vitamin D.
    47:17 💉 Higher vitamin D levels reduce cancer risk. Sunlight regulates genes and metabolism.
    52:30 ☀️ Sensible sun exposure has no downsides. Supplements help achieve healthy vitamin D levels.
    Made with HARPA AI

  • @altagraciarodriguez182
    @altagraciarodriguez182 3 роки тому +1

    Can we humans use the pet uvb lamps to produce vit D?

  • @aryankarki7900
    @aryankarki7900 6 років тому +8

    Pleass listen to Dr jack kruse.

    • @askjdog
      @askjdog 3 роки тому +1

      He changed my mind on getting tattoos. Still need to buy some blue light blocking glasses.

  • @chuyruiz14
    @chuyruiz14 4 роки тому +1

    Wow the last person who asked something was 4 years ago .... hope someone answers....

  • @ChrisGroggyCreaser
    @ChrisGroggyCreaser 2 роки тому

    **Dear UCT,In England - we Don't get much sunlight!!... :( *Can using sunbeds help us??... :)

  • @rustymcgee7488
    @rustymcgee7488 4 роки тому +5

    I think when he explained how darker skinned individuals need to stay out in the sun longer to get the same level of vitamin d as caucasians, he could have gone into deeper detail (albeit, I’m sure his audience are a bunch of caucasian just like himself so its not important to point this info out to them, however it should be if you are really trying to learn the most)
    While it does take darker skinned individuals longer to achieve the same level of vit d as a light skin individual that is perfectly fine & is a good thing because they can actually take longer amounts of time outside in the UV rays without experiencing adverse effects like caucasians who would suffer skin burn and mutations that could ultimately lead to skin cancer. Darker skin individuals do not face this drawback as readily as light skin people & are allowed more time outdoors in the sun to get their vitamin d freely with little drawback. Caucasians need to be more careful & its a adequate mutation for them to get their vitamin d, but a perfect design for darker skin people as he mentioned early in the video. The darker skin is actually much more beneficial than having pale light skin. The darker skin can spend more time outdoors without adverse effects & is more resilient. Just something i think he may have forgot to add.
    Much of this information is targeted to white people...we need unbiased delivery of information. Not one sided leaning info. Shame!!!

    • @User.Joshua
      @User.Joshua 3 роки тому +2

      Thanks! Most of the literature or videos definitely target one demographic. I simply have to guess or extrapolate from their given values.

    • @itsjustme5620
      @itsjustme5620 2 роки тому

      They gatekeep a large portion of information that specially benefits dark skinned people

  • @zarinhirani8928
    @zarinhirani8928 4 роки тому

    Which is the right time to take Sunbath in Muscat Sultanate of Oman

  • @mocha100blu3
    @mocha100blu3 4 роки тому +5

    "In Deed!" Thank you for posting. My doctor put me on 50,000 IU of Vitamin D Per week. I will get some Sun to knock off these pills!

    • @Data_-xw7yw
      @Data_-xw7yw 4 роки тому

      MOCHA100 BLU same here, but don’t do it until you see progress. Last June I went to the beach , I was under some trees and developed an allergy that has lasted until today. Anytime I go out to the sun even if is for 5 minutes I faint!

    • @mac2brown
      @mac2brown 4 роки тому +1

      @@Data_-xw7yw my kid gets sun poison and faints too...so do I and we are dark!!!

    • @kathleenmurphy2379
      @kathleenmurphy2379 4 роки тому

      I don't think he's saying anything about reducing what the doctor tells you to take by staying out in the sun.

  • @iMiker62
    @iMiker62 3 роки тому +1

    This would have been a wonderful community lecture if not for the inconsistency of the the volume coming through our speakers...when the good professor acknowledges his graphs or chart assistants....he turns his head into them and away from the microphone. It happens in all of the lectures done in this format. Perhaps have the speakers wear a microphone where it follows their voice output.

  • @sumanjsh
    @sumanjsh 6 років тому +6

    What about benefits of sunlight for our eyesight?

    • @thisbullrocks6030
      @thisbullrocks6030 4 роки тому +4

      I healed my eyes after throwing out my sunglasses - I used to have a problem seeing distance - very sun sensitive - then I decided to get rid of them and I also take 12 mg of astaxanthin - now my vision is perfect - no glasses - I am 62... you need the uv light for sure

    • @blueskythinking8312
      @blueskythinking8312 4 роки тому

      @@thisbullrocks6030 that's all u did to heal ur sight? That's amazing

    • @thisbullrocks6030
      @thisbullrocks6030 4 роки тому +2

      pretty much - I take chlorella daily … as well as vit D - but I think getting rid of your sunglasses is key

    • @elsagrace3893
      @elsagrace3893 4 роки тому

      This Bull Rocks I’ve not worn sunglasses my entire life. At 50 I needed cataract surgery.

    • @joncunningham9925
      @joncunningham9925 4 роки тому +1

      God does not make mistakes in what he creates. IMO

  • @saginaw60
    @saginaw60 3 роки тому +1

    I bask for 10 minutes a day with a UVB lamp , but at what point does one worry about skin damage ?

    • @karoo_bushman6880
      @karoo_bushman6880 3 роки тому

      Get a 660nm + 850nm LED array and expose the same area you expose to UVB. Get very close (0-30cm) and do 10-15 minutes sessions, once a day. Scientifically shown to improve collagen production and mitigate any damage done by UVR. Even protects for future UVR if done before. Many peer reviewed studies showing this, do a google.

  • @girlinterrupted9145
    @girlinterrupted9145 4 роки тому +2

    That was my question, does research show less cases of cancer in areas where there is more opportunity for exposure ...
    Excellent presentation

    • @danam.5433
      @danam.5433 4 роки тому

      Unfortunately, in Australia where there is plenty of sun, there is also plenty of skin cancer, melanoma.

    • @askjdog
      @askjdog 3 роки тому

      @Dana M. - Amongst the non-natives primarily I imagine, and wonder what the correlation is to diet, lifestyle choices, and overall health.

  • @douglasthompson2740
    @douglasthompson2740 4 роки тому +1

    What is the correlation between UVB exposure to the skin in various latitudes and seasons with clear or overcast conditions? In the peak of summer on a heavy overcast day I am assuming that the UVB levels would be nonexistent?? At 55 degrees N latitude in a temperate coastal rain forest what amount of Vitamin D3 can be accumulated over a typical summer? Since we have less than 100 sunny days year round which includes partially cloudy days and precipitation on 234 days (averages some years can be considerably darker and wetter) the manufacturing of Vitamin D3 in a normal body (which brings up the question of relationship of extremely obese, large surface area to a slender small surface area production of D3?) would be insufficient for good health?? Is artificial sunlight better than supplemental D3?
    I appreciate the presentation to help balance the near hysterical phobia against sunlight that has cropped up in the past thirty years. Doug

    • @dlarge6502
      @dlarge6502 4 роки тому

      Good question. Basically in the UK there is no significant UVB from the sun after October till May. I'm wondering why we are not told to supplement...

  • @chriswilkes2438
    @chriswilkes2438 4 роки тому

    You need a clip on mic

  • @petercyr3508
    @petercyr3508 4 роки тому +3

    Watching to see if he says how long to wait before showering after getting a dose of sun to allow vitamin D synthesis

    • @kathleenmurphy2379
      @kathleenmurphy2379 4 роки тому +1

      And one of his other lectures he says you don't have to wait at all it's already below the surface it's made in live skin tissue if I remember correctly. And remember it's dead skin skin cells we wash off

    • @rickknight3823
      @rickknight3823 4 роки тому +2

      I remember hearing elsewhere that sun starts the process of making the "hormone" not vitamin D on the skin - 2 days showering without soap and only water helps with absorbtion.

    • @kathleenmurphy2379
      @kathleenmurphy2379 4 роки тому +1

      @@rickknight3823 I think I posted here his second lecturer and he said the hormone is made below the first layer of skin so you can't wash it off that's a fallacy

    • @kathleenmurphy2379
      @kathleenmurphy2379 4 роки тому +1

      @@rickknight3823 I also was under the assumption you should wait a while to shower because you'd wash the vitamin D that is actually a hormone not a vitamin off your skin it needed to be absorbed. But this scientist in another lecture said it's made below where you can wash it off

    • @rickknight3823
      @rickknight3823 4 роки тому +1

      @@kathleenmurphy2379 we'll have to try and cross reference that bit of info then.
      This scientist doesn't look the healthiest.. although that may have nothing to do with his ability to absorb and create D hormone...

  • @SpaceCredits
    @SpaceCredits 2 роки тому +3

    The Sun is an entity a God for thousands of years we've seen it as that, the Sun is healing and provides us with spiritual benefits. -> Test it out yourself. Don't let culture influence your mind otherwise you're going to still think candy breakfast cereal is good for your health

  • @zarinhirani8928
    @zarinhirani8928 4 роки тому

    Temperature is 40 degrees now

  • @anniep9294
    @anniep9294 3 роки тому +1

    Sunlight is so important use your common sense while is sun

  • @kendalharris4813
    @kendalharris4813 4 роки тому

    Some plants thrive in direct 🌞 some plants are better in shade or need less 🌞 just maybe people are the same.

  • @SaxMonsterSteve
    @SaxMonsterSteve 2 роки тому

    hahahaha omg what a presentation. thanks!

  • @jjayneartworkx
    @jjayneartworkx 4 роки тому

    🌞🙌⚡💛

  • @matthewalvarez-mahoney7801
    @matthewalvarez-mahoney7801 3 роки тому +3

    Wow. The sun in the beginning looks like the model of coronavirus. Could sunlight have something to do with the cure?😏

  • @jermainedawson7862
    @jermainedawson7862 2 роки тому

    Listen, if you going to make sense about sunlight , you got to break it down so that we see the difference with those who are fortunate to born and live where sunlight appears everyday, show us those who fortunate, and those who are unfortunate, there life spon , who live longer , is it , those who have the sun, or is it those with limited sunlight, remember stress kill us, so if human beings short of anything that is of health benefits, they likely to die earlier than they should

  • @chuyruiz14
    @chuyruiz14 4 роки тому +1

    Not really sure of Talking vitamin D supplements... some say it’s bad ....

    • @Noor-jw2tn
      @Noor-jw2tn 4 роки тому

      Listen

    • @joncunningham9925
      @joncunningham9925 4 роки тому +1

      Pills will never replace the SUN!!!
      Pills have so much junk in them that they will do more harm than good!!! IMO

  • @ENFPerspectives
    @ENFPerspectives 2 роки тому

    1Lord, our Lord,
    how majestic is your name in all the earth!
    You have set your glory
    in the heavens.
    2Through the praise of children and infants
    you have established a stronghold against your enemies,
    to silence the foe and the avenger.
    3When I consider your heavens,
    the work of your fingers,
    the moon and the stars,
    which you have set in place,
    4what is mankind that you are mindful of them,
    human beings that you care for them? c
    5You have made them d a little lower than the angels e
    and crowned them f with glory and honor.
    6You made them rulers over the works of your hands;
    you put everything under their g feet:
    7all flocks and herds,
    and the animals of the wild,
    8the birds in the sky,
    and the fish in the sea,
    all that swim the paths of the seas.
    9Lord, our Lord,
    how majestic is your name in all the earth!
    - Psalm 8

  • @joaopedrogr
    @joaopedrogr Рік тому

    29:15 Caralho, até aqui tem Xuxa com Pelé

  • @istp1967
    @istp1967 4 роки тому +1

    This dude looks like me; but with a bigger nose and glasses 😂😂😂

  • @marykelly6929
    @marykelly6929 3 роки тому

    I have no pigment .

  • @livelearnandteach7402
    @livelearnandteach7402 3 роки тому +4

    It is funny how much advice we have been given over the last 30-40 years that is completely wrong......in fact you need to completely reverse the advice to improve your health.

  • @eugene5323
    @eugene5323 3 роки тому

    the problem here is getting a quality vitamin D supplement

  • @vicplichota
    @vicplichota 9 років тому +5

    Cosmic rays are NOT part of the EM spectrum.

  • @manumaster1990
    @manumaster1990 5 років тому +1

    :)

  • @sc4894
    @sc4894 4 роки тому

    Why does he look familiar

  • @jermainedawson7862
    @jermainedawson7862 2 роки тому

    The reason why I write that , is because there is a little error

  • @lynnwilliams5432
    @lynnwilliams5432 4 роки тому

    Take tax off

  • @glennrobinson7193
    @glennrobinson7193 4 роки тому

    This lecturer doesn't look like he gets much sunlight. Pale looking skin.

    • @ujwiersma8482
      @ujwiersma8482 4 роки тому

      That thought occurred to me, too. There is something to be said for walking your talk and being a good role model. Do as I say, not ....

    • @cathybrown4102
      @cathybrown4102 3 роки тому

      He can get his sunshine but doesn’t let himself burn. Remember getting 15 mins at the right time of day can give your body 20,000 iu that your body will store for days so there is no need to go out every day

  • @robertmanning9857
    @robertmanning9857 3 роки тому +1

    WWG1WGA

  • @spencerkimllido7327
    @spencerkimllido7327 6 років тому +2

    Skin Cancer

  • @doctorsavvy1318
    @doctorsavvy1318 3 роки тому

    for some reason, black people don't have these problems.. hmm... must be a coincidence