yoga, they won't use my blood not because it's unhealthy but because it's loaded with the painkillers I need but which for someone else might be a bother! Like you, I was a regular donor at one time, then they started just taking platelets (I had a high count apparently and platelets are useful for treating leukaemia) — take out a half litre of blood, spin out the platelets, pump the red blood cells back in, take another half litre, etc., five times. That way I could donate every month because making platelets takes hardly any time whereas you need a few months' gap if they take your red blood cells in whole blood. Then, coinciding with the Aids/HIV scare they made all the rules much stricter and decided the painkillers that I'd been taking all along (which they knew about) plus the fact that I was on the borderline to be heavy enough to give blood anyway, meant it wasn't a good idea for me to be a donor. Oh well, did my bit while I could.