I know this is an older post, but I would like to update what happened to me today. I had my gastric sleeve on October 3rd and have been cleared by my doctor for normal diet and normal activities, but the plasma center I went to today has told me I cannot donate for 12 months post-op. That really sticks a thorn in any holiday shopping I was hoping to do. I am going to be looking for another plasma center to see if I get the same story.