how often can you donate blood per year
A: For plasma donors, the American Red Cross website says: You can donate every 28 days, and up to 13 times a year. Plasma can be donated at least once every three weeks, preferably every four weeks. Platelet donors can donate as often as every eight days, and up to 24 times in a 12-month period.. For plasma, you can donate frequently as twice in any period of seven days, and you must have at least one rest day between donations. A person can donate more than 2 times every 7 days with at least one day interval between donations.