The hormone that tells those stem cells in your red bone marrow to make more blood cells is a hormone called EPO or e-reathproietin. So if you were to somehow get more of that into your body... What now? It would make more red blood cells. And so if you're killing off a fair few too, you're losing lots. Or you're losing a million a second, I think. Anyway, the mask training. I did a ... The restricted flow train. One off. He's a neurosurgeon. We did our PhD together and he's now doing neurosurgery. Okay. Hey babe, what you got there? This is a check from