Steve said:
>> I've always assumed that modern man has higher iron levels since 
>> Paleo man probably lost a lot more blood from cuts, scrapes, 
>> parasites, hunting injuries, etc so that giving blood might be a good 
>> thing since it would lower iron levels (higher iron helps infectious 
>> bacteria to reproduced) and force replacement of blood cells with 
>> more youthful ones. Stimulating the skin from hunting/running might 
>> be something we adapted too also benefit from.
>>
Most moderns eat far less meat and likely eat far less green leafy 
vegetables. We have some genetically ordained, stringent limitations on 
our iron absorption capacities. The blood losses you attribute to Paleo 
humans are quite common among moderns who work at manual labour, are 
engaged in body-contact sports, or are physically active on weekends in 
the woods, etc. Further, intestinal infections and parasites are much 
more common in agricultural communities (especially where animal 
husbandry is involved) and denser urban populations than in the much 
lower population densities associated with HG groups. Nonetheless,  you 
may be correct in asserting that giving blood is healthful.

Best Wishes,
Ron Hoggan




-- 
PK