So I just went and donated blood again and durring the recovery period it occured to me that it takes quite a bit of work for your body to regenerate that lost blood volume and the actual blood cells. Regrowing that many cells seems like it would be fairly energetically intensive. So how many calories does producing all those new blood cells actually consume? Is there even a way to know that?
We have 10-ish units of blood in our body. When we donate we give one unit. A unit is around 500ml. Someone else on the thread says 650 cal per donation. That means each ml of blood takes 1.3 calories to make. Work harder you lazy bastards! I didn’t make you out of butter to pump like this!