The libraryDefense

Vitamin A

Vision and the lining of your gut and airways are what it fixes in a man short of it, and past that your liver stores every extra dose.

Also called Retinol, Retinyl Palmitate, Retinyl Acetate, Retinaldehyde, Retinoic Acid, Provitamin A Carotenoids

Who it's forAny man on a multivitamin, cod liver oil or beta-carotene, and any man who smokes.

The item

Three squares: proven in human trials. Two: a strong signal. One: early human data. Striped: the trials disagree.

Emergency: call 911.

I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.