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The "What’s behind the deficiency" section seems to point to sunlight exposure as a very important part of the equation. In particular: > As we found in the st
by kevinmchugh 6y ago
The "What’s behind the deficiency" section seems to point to sunlight exposure as a very important part of the equation. In particular:
> As we found in the study, urbanisation seems to be a major cause. People are spending more time indoors. In contrast, Africans in rural settings have been reported to have one of the highest levels of vitamin D in the world.
- amai 6y agoThat would be in contrast to the common knowledge that 15 min in the sun are enough for a good Vitamin D level, especially 15 min in the African sun. I simply can't imagine that you can live in Africa without getting enough sun. That would mean that you basically have to stay underground all the time. I believe there is a second factor (often overlooked) that causes low Vitamin D level in the blood: Magnesium deficiency: https://pubmed.ncbi.nlm.nih.gov/30541089/ https://pubmed.ncbi.nlm.nih.gov/30541089/
- kevinmchugh 6y agoAs your previous link mentioned, not all of Africa is equally sunny. But really the difference is that people with darker skin need to spend more time in the sun to get enough Vitamin D. At least one source says folks with very dark skin need six times as much sunlight as those with very light skin. I've seen 3 hours daily recommended before as well. It's going to be challenging for an urban person at any latitude to get that much sunlight in a typical day. https://health.usnews.com/wellness/articles/2018-07-18/how-much-time-in-the-sun-do-you-need-for-vitamin-d https://health.usnews.com/wellness/articles/2018-07-18/how-m...