4000 IU daily is the safe upper limit for a daily dose according to the NIH. The body buffers D3 by building up stores in the spring and summer. So in order to see benefit any time soon at all, an initial one-time only large loading dose(or doses) should be taken, ideally with a fatty meal. I’m not sure if providing a conservative number here would be against the forum rules.
I can’t comment on what anyone should take, but I’m a ~215 lb male, and a few years ago (age 30) I was diagnosed with a mild Vitamin D deficiency and prescribed 50,000 IU once per week for either one or two months.
I can’t comment on what anyone should take, but I’m a ~215 lb male, and a few years ago (age 30) I was diagnosed with a mild Vitamin D deficiency and prescribed 50,000 IU once per week for either one or two months.