A friend of mine told me that his anti aging doc, who is a bodybuilder, suggested that he donates blood. Doc stated that on off cycles of test for years thickens your blood and will make you feel fatigued. My friend claimed that he felt much better the next day after donating the blood. Apparently after donating, your body obviously needs to replace that blood and it is thinner. Has anyone ever heard of this? Is it worth doing? I usually get blood work about twice a year, but according to him the donation is a pint as opposed to three vials which is not enough to solve the supposed problem. I could not find anything on the forum about it. Thx