Here are some other things you can do beside donating:
Cardio 20 minutes a day 6 days a week. Bicycle works best...cyclists always have lower crit. Runners second.
I am on 100mg test c per week for hrt (for 2 years or so) and over the past year I have been mountain biking consistently, in addition to my workouts: 2 intense rides per week. I just had labs drawn a few weeks ago and my crit was 45. My doc was very surprised saying "most of my trt patient's hct run significantly higher". Plus, I feel much better overall getting outside pushing myself on the bike.
Nice! 45 is a good place to be! Genetics plays a role too. And clotting disorders are a bitch if a person is predisposed. At first, cardio may cause crit to rise, but then should go down a bit in many cases.
Doing the cardio did nothing for lowering my HCT. I wish it had. I now do 45 mins a day on the treadmill which is about 3 miles for me and it had zero affect. thats just my personal experience. So it doesnt work for everyone and I would not rely on it to lower it. DOing cardio though is extremely healthy and we should all do lots of it anyhow, so do as much as you can.
That's a bummer, Maldorf! Sound advice here too, don't rely on any one thing. Donate, cardio, Grapefruit, aspirin, water, etc....every day. That way, if you miss a day on one thing, it's not the end of the world! Literally!
Im going in to donate in the next two weeks, so we'll see if Im still good. I've recently started Deca which can do a number on Crit...but my cycles are short and moderately dosed and my off time is long. But it's TRT so Ive got to be careful.
Just anecdotally, it's been good thru many cycles. My last test was after a month of Drol and Test/Mast for 2 months. I attribute being ok to plenty of movement every day, all the above and a couple things no one mentioned...but there's no science behind these: I'm sparing with red meat. I love it, but in Europe we eat lost of chicken and pork. So less iron in the diet overall. And I drink shitloads of coffee, which has been shown to decrease iron absorption. Does it contribute? Dunno. But so far so good.