
Originally Posted by
Charlie67
Its hard to say exactly. I cycle regularly, and I give blood regularly, and my levels stay in check. I worry more about passing the prescreening iron finger-prick test more than anything else. I do try to land my appointment in the later half of a cycle, but I give as often as their requirements allow.
Side note: for some, donating often my be a problem. I'm not sure why exactly, but there are some medical conditions where you wouldn't want to donate too often. Just be aware of that.