Vitamin Repletion

[carlsonbjj]

How long does it take to replete a deficient vitamin? In the 4-hour body Tim Ferriss said that Selenium increased his testosterone by 400ng/ml (he corrected a selenium deficiency). He never specified the amount of time that it took for this to happen.

How many months do you think it takes for this significant change to happen?

I have insufficient retinol and glutathione levels as well, so that is how it pertains to me personally.