Some supplements like zinc are difficult to get enough of if, for example, one does not eat oysters or shellfish in general. The RDA for zinc is 10 mg of elemental magnesium yet what most companies sell is more on paper, but way less in terms of elemental zinc. A lot of zinc supplements contain a mere 20 % of elemental zinc, so that 50 mg of zinc sulfate or whatever is about the RDA. How do you guys go on about supplementing minerals like magnesium and zinc? Fixing a deficiency in zinc can be great for men!
Zinc - Scientific Review on Usage, Dosage, Side Effects | Examine.com
Zinc - Scientific Review on Usage, Dosage, Side Effects | Examine.com