Vitamin D efficiency study referenced in NYT article
Re: Vitamin D efficiency study referenced in NYT article
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Re: Vitamin D efficiency study referenced in NYT article
The body makes vitamin D. I don't believe the body makes useless things, evolution selects against that. If someone says they are a vitamin D nihilist, they instantly lose credibility with me.
Evolution also quickly selected for pale skin (less than 7,000 years of selection, likely less than 2,500 years of selection, which is pretty darned fast in long lived animals) in humans who migrated to Europe and even more to northern Europe. This affects vitamin D production but not NIR.
Skin levels are darker everywhere in the world the closer you get to the equator and the more sun exposure you get. This is for protection against skin cancer. Vitamin D levels in equatorial populations are far higher than in northern ones and their cancer rates are far lower across the board. You can see this if you google for charts showing cancer rates by latitude. It's pretty dramatic. Even taking supplements I have been unable to reach their blood levels of vitamin D. As you move north or south the skin lightens as the evolutionary advantage of maintaining vitamin D production through sun exposure makes itself felt and outweighs skin cancer concerns.
Rickets is real. Cod liver oil (rich in D) became a popular item because it prevents the disease, in fact it was key to discovering vitamin D. There is no doubt taking vitamin D as a supplement can be helpful or even critical if you aren't getting enough sun, nihilists notwithstanding. If something prevents/cures a disease, it's hard to deny its value with a straight face.
You can overdose on literally anything including water. I have been taking 5,000 iu of vitamin D a day for 12 years at least with no ill effects. When tested my blood levels for it were normal, not much above deficiency levels. It's quite hard to get them really up there to the levels enjoyed by the central latitude populations.
I should note Dr Fauci takes thousands of iu a day (different articles give different amounts, it's either 4,000 or 6,000) and recommends it for strengthening the immune system. As head of the National Institute of Allergy and Infections Diseases for 38 years, and an immunologist, I think he knows a bit about the immune system.
The NIR stuff sounds interesting and I look forward to reading more about it. It's quite possible both NIR and vitamin D are really important, it does not have to be either/or.
Evolution also quickly selected for pale skin (less than 7,000 years of selection, likely less than 2,500 years of selection, which is pretty darned fast in long lived animals) in humans who migrated to Europe and even more to northern Europe. This affects vitamin D production but not NIR.
Skin levels are darker everywhere in the world the closer you get to the equator and the more sun exposure you get. This is for protection against skin cancer. Vitamin D levels in equatorial populations are far higher than in northern ones and their cancer rates are far lower across the board. You can see this if you google for charts showing cancer rates by latitude. It's pretty dramatic. Even taking supplements I have been unable to reach their blood levels of vitamin D. As you move north or south the skin lightens as the evolutionary advantage of maintaining vitamin D production through sun exposure makes itself felt and outweighs skin cancer concerns.
Rickets is real. Cod liver oil (rich in D) became a popular item because it prevents the disease, in fact it was key to discovering vitamin D. There is no doubt taking vitamin D as a supplement can be helpful or even critical if you aren't getting enough sun, nihilists notwithstanding. If something prevents/cures a disease, it's hard to deny its value with a straight face.
You can overdose on literally anything including water. I have been taking 5,000 iu of vitamin D a day for 12 years at least with no ill effects. When tested my blood levels for it were normal, not much above deficiency levels. It's quite hard to get them really up there to the levels enjoyed by the central latitude populations.
I should note Dr Fauci takes thousands of iu a day (different articles give different amounts, it's either 4,000 or 6,000) and recommends it for strengthening the immune system. As head of the National Institute of Allergy and Infections Diseases for 38 years, and an immunologist, I think he knows a bit about the immune system.
The NIR stuff sounds interesting and I look forward to reading more about it. It's quite possible both NIR and vitamin D are really important, it does not have to be either/or.
_________________
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Re: Vitamin D efficiency study referenced in NYT article
There’s a chicken and an egg somewhere and all of this. it may be that people at the equator have more vitamin D because you’re exposed to more sun and it may or may not have anything to do with the amount of melatonin in their skin.tisket wrote: ↑Sun Aug 14, 2022 10:48 amThe body makes vitamin D. I don't believe the body makes useless things, evolution selects against that. If someone says they are a vitamin D nihilist, they instantly lose credibility with me.
Evolution also quickly selected for pale skin (less than 7,000 years of selection, likely less than 2,500 years of selection, which is pretty darned fast in long lived animals) in humans who migrated to Europe and even more to northern Europe. This affects vitamin D production but not NIR.
Skin levels are darker everywhere in the world the closer you get to the equator and the more sun exposure you get. This is for protection against skin cancer. Vitamin D levels in equatorial populations are far higher than in northern ones and their cancer rates are far lower across the board. You can see this if you google for charts showing cancer rates by latitude. It's pretty dramatic. Even taking supplements I have been unable to reach their blood levels of vitamin D. As you move north or south the skin lightens as the evolutionary advantage of maintaining vitamin D production through sun exposure makes itself felt and outweighs skin cancer concerns.
Rickets is real. Cod liver oil (rich in D) became a popular item because it prevents the disease, in fact it was key to discovering vitamin D. There is no doubt taking vitamin D as a supplement can be helpful or even critical if you aren't getting enough sun, nihilists notwithstanding. If something prevents/cures a disease, it's hard to deny its value with a straight face.
You can overdose on literally anything including water. I have been taking 5,000 iu of vitamin D a day for 12 years at least with no ill effects. When tested my blood levels for it were normal, not much above deficiency levels. It's quite hard to get them really up there to the levels enjoyed by the central latitude populations.
I should note Dr Fauci takes thousands of iu a day (different articles give different amounts, it's either 4,000 or 6,000) and recommends it for strengthening the immune system. As head of the National Institute of Allergy and Infections Diseases for 38 years, and an immunologist, I think he knows a bit about the immune system.
The NIR stuff sounds interesting and I look forward to reading more about it. It's quite possible both NIR and vitamin D are really important, it does not have to be either/or.
I certainly don’t proclaim to have any answers there.
I do know that as someone without a gallbladder I have a hard time absorbing vitamin D. I could take cod liver out the Wazoo but I can only digest and absorb just so much because of the lack of bile which is necessary to break down fat soluble vitamins.
so there’s that…..
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Re: Vitamin D efficiency study referenced in NYT article
Try to read in context. The doctors are talking about vitamin D supplementation in healthy people.
But Dr. Cummings and Dr. Rosen remain firm, even questioning the very idea of a vitamin D deficiency for healthy people.
“If vitamin D doesn’t help, what is a vitamin D deficiency?” Dr. Cummings asked. “That implies you should take vitamin D.”
And Dr. Rosen, who signed off on the National Academy of Medicine report, has become a vitamin D therapeutic nihilist.
“I don’t believe any more in 600 units,” he said. “I don’t believe you should do anything.”
Re: Vitamin D efficiency study referenced in NYT article
Perhaps Dr Rosen forgets a lot of foods are now fortified with vitamin D, because of hard lessons from the past when children had to take cod liver oil to avoid rickets. Supplementation is baked right into the food supply.
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ResMed Airsense 10 Autoset, Aloha nasal pillow mask using HoseBuddy for overhead hose management, Nexcare paper tape for mouth
ResMed Airsense 10 Autoset, Aloha nasal pillow mask using HoseBuddy for overhead hose management, Nexcare paper tape for mouth