DONATING BLOOD MAY SAVE YOUR LIFE:"..., blood donors have been found to be 88 percent less likely to suffer from a heart attack,

"4 Unexpected Benefits of Donating Blood"
"..., blood donors have
been found to be 88 percent less likely to suffer from
a heart attack, and this is thought to be due to its
effects on iron levels. Researchers explained:"
http://articles.mercola.com/sites/articles/archive/2014/07/28/blood-donation-benefits.aspx