Posted by:
azsteve
(
)
Date: November 02, 2019 08:10AM
Our source of vitamin D (probably other critical things too) is from sunlight's reaction on the skin. A mother's breast milk doesn't give her baby vitamin D. Although we can get some vitamin D from diet and in pill form, it's not nearly enough from that method (especially for our ancestors who didn't have access to modern dietary supplements). Dietary vitamin D is also not in a very transportable form, to reach everywhere your body needs it, if you injest it. When it comes in through a ultraviolet radiation (wavelength B) against the skin, an extremely transportable form of vitamin D is made in greater quantities in about twenty-minutes of exposure, than most people would ever take enough pills to get the same amount.
For those people in areas of the world where sunlight can be scarce for months at a time, the skin lightened to become more receptive to what little sunlight was available. I have had low vitamin D for most of my adult life. I work inside. I walk in to a building in early morning and leave that building in the late afternoon where I am then inside of my car or home. I learned how to increase my vitamin D drastically a few years ago. Now it stays between middle of the normal range to the upper part of the healthy range and I don't take any vitamin D dietary supplements. I use tanning services three times or so per month. You have to specify a UVB bed (not UVA). Don't go the whole time if you see yourself starting to tan significantly. You don't want the tan. You want the UVB rays. Without modern technology, it is no surprise that some of our ancestors got pretty white. There is a fine line between staying healthy and doing something that can give you cancer. Unlike the sun, the rays from a tanning bed are regulated by law, to protect our health. Only those who abuse them to get real dark are at risk. If all you want are enough rays to get enough vitamin D, you're probably safer using this method than from using natural sun light for the same purpose. Our ancestors didn't live as long as we do now either, for several reasons.
https://www.grassrootshealth.net/canadian-study-finds-tanning-salon-sunbeds-effective-raising-vitamin-d-levels/From the article: "Most evolutionary biologists believe skin colour evolution occurred when fairer-skinned cultures migrated further from the equator so the skin would more efficiently produce vitamin D in light-deprived parts of the world."
Edited 4 time(s). Last edit at 11/02/2019 09:25AM by azsteve.