In reading this thread I notice that Americans seem to be able to donate blood everyh 8 weeks. In the UK it is every 16 weeks (Apparently they will accept you after 12 weeks, but only once in the year). This is quite a large difference.
When I was giving blood last week I was talking to the nurse who was looking after me, and they said that it took between 12 and 16 weeks for your red blood cell count to get back up. However, if Americans are donating every 8 weeks this surely cannot be the case? Or are we Brits a nation of anaemics who take twice as long to grow red blood cells? I