Hello @gentleshaid,

My understanding is that they extract the plasma from whole blood. The run it through a machine and return the red blood cells and whatever else to you. They also harvest platelets this way.

I only gave blood once. It was a blood drive at work by a hospital association. I fainted afterwards, I think because I was anemic. I'm not a good candidate because of that. Anyway, I'm really afraid of needles ;))