I don't donate whole blood too often (they usually want me for platelets every 2 weeks if they can get it). https://versiti.org/ways-to-give/about-blood-donati

I don't donate whole blood too often (they usually want me for platelets every 2 weeks if they can get it). https://versiti.org/ways-to-give/about-blood-donation/blood-donation-faqs https://versiti.org/ways-to-give/about-blood-donation/blood-... 56 days or 8 weeks for whole blood. It doesn't say why.