Doctors usually assume that Americans are so well fed that never have to worry about supplements. In fact, sometimes it fuss that people taking vitamin pills could overdose on vitamin D or vitamin A, fat-soluble vitamins that are stored in the body. This concern is justified?
it turns out that many Americans have low levels of vitamin D circulating in their bodies. This is especially true of African Americans because dark skin takes longer to produce vitamin D in the presence of sunlight. Those with adequate levels of 25-hydroxyvitamin D, the measured metabolite usual, in general, have been taking supplements ( Journal of nutritio n April 2015 ). What about people from other countries?
Australian and Vitamin D:
P I’m glad you’ve been writing about vitamin D. Even here in Australia, many people have low levels of vitamin D.
Whites are at risk of skin cancer, with 48 percent of skin cancers occur in people of Celtic descent. (There is much in Australia). But we have gone overboard: work on the inside, apply sunscreen and wear hats. We not surprisingly ended lower in vitamin D
If you are an indigenous Australian, whether Aboriginal or Torres Strait Islander (TSI), and work for the government, free vitamin D tablets is obtained. A friend ETI is a lawyer and works inside.
She is very dark skin and therefore need more vitamin D. However, she spends her weekends doing traditional work of women TSI fishing while wearing clothes too small.
She told me that the government was concerned about “excessive vitamin D ‘when most new reef keepers were people TSI. Is that possible?
A. If the guards reefs were taking vitamin D pills, besides working in the tropical sun, they could get too much vitamin D. However, would the pills, not the sun exposure. The body has feedback mechanisms to avoid taking excessive vitamin D ( Mayo Clinic Proceedings April 2012 ).
Can an overdose of vitamin D?
Excess vitamin D may actually lead to toxicity. This has happened, especially when given to a baby or toddler vitamin drops to an overdose of vitamin D ( Journal of Steroid Biochemistry and Molecular Biology April 2015 ). Adults who take high doses of supplements may also suffer an overdose of vitamin D ( Food and Chemical Toxicology June 2012 ).
You’re right that many fair-skinned people in sunny climates can become low or even vitamin D deficiency to spend most of their time indoors. This happens in the southern United States and in Australia.
We have written about this issue in our Guidelines for Vitamin D deficiency . Tells how to know if you need vitamin D supplements and what can be if you do not get enough vitamin D.