I don't know why this keeps coming up. It's proven that a significant number of people are deficient in vitamin D, and also Magnesium I believe.
I'm also of the opinion that no one is getting enough potassium (but vitamins won't help with that).
I'm also of the opinion that no one is getting enough potassium (but vitamins won't help with that).
- For most people, vitamin D is lack of sunlight.
- Magnesium absorption depends on how well your intestines are working because ~50% is excreted. It's also related to diet and lifestyle (soda hinders absorption, coffee and stress increase excretion). On top of that, low intra-celullar Mg levels are not detectable with a simple blood test, so most people don't even know they are deficient until it gets severe.
- Too much vitamin A is toxic, but our body can metabolize vitamin A from carotenoids like Astaxanthin which are much better tolerated.
There are now more studies concentrating on the precursors to vitamins and absorption than the vitamins themselves.
I found out from my doctor I was deficient in vitamin D and calcium probably due to diet I'm allergic to milk. So I started taking vitamin D and calcium supplements.
Later I found out from my personal genome study, that my body doesn't process vitamin B correctly, so I need much larger doses than the average person.
I think once people begin to get personalized genome information, a lot of misinformation surrounding diet,vitamins, and nutrients will be cleaned up.