Originally Posted by
x88x
The blood bank I'm a member of, I think it's a max of once every 56 days or so, or twice that if you do their new...somethingphoresis..somethingsomething..inste ad of just taking out whole blood and being done with it, they take it out, separate out the red blood cells, keep those, and put everything else back it. It takes about twice as long, but they get twice as many red blood cells and it takes less of a toll on your system. Feels really weird though, because when they put it back in it's cold (room temp in an air-conditioned building), and it takes a while for it to warm back up to body temp...so you can feel it flowing back through your system. Very strange sensation, that, especially when it gets to your heart. They'll only ask certain blood types to do it though, I think A and O. Gotta love us O's. :P