bobbythebody
New member
I've been on testosterone replacement therapy (TRT) for about a year and a half and donate blood at the Red Cross regularly. I'm curious if its beneficial to donate double red instead of the single unit. I'm O+ and they are always pushing for me to give doubles 3x a year. When they do doubles they filter rbc's and put the plasma back. Does anyone do doubles? Is it more sensible to do singles every 2 months or doubles every four?