How often can you safely give blood?!
Question:
How often can you safely give blood?
Answers:
Regulations in the United States allow people to donate whole blood once every 56 days. The waiting period between donations can be different for other blood components. For example, donating only platelets in a process called apheresis requires only a 3 day wait before a person can give again. Donating two units of red blood cells through a similar process doubles the waiting period to 112 days.