In regard to the letter from the firefighter's wife who wondered about toxins on the job, and blood donations--I read in one of Jean Carper's health books that donating blood 3x year could rid the body of excess iron. Iron has been implicated as a culprit in free radical production in PD. So I wondered if donating blood several times a year could actually be beneficial. Our nephew has hemochromatosis, which is a potentially lethal accumulation of iron (not from his diet), and he has blood drawn on a monthly basis to get rid of the excess iron. So there could be something to it. Has anyone ever heard of this? Would love to hear your comments. Thanks in advance. Ann Gibbons