1, there is some new info about whether you need to donate and otherwise being misdiagnosed with PCV.
This is worth your time: https://www.youtube.com/watch?v=ynHXydSGRR0&t=1501s
2, you see this vicious cycle they get you in to with this misdiagnosis. You donate, which destroys your ferritin in short order. A few donations in the year will wreck your Ferritin and iron stores. Can lead to other problems but Thyroid is one as iron is needed in the T4>T3 conversion.
So they make you take iron, which quite possibly drives up your RBC/HCT, and then again acting on the misdiagnosis, push you to donate, again. Then they hammer you why your Ferritin is in the subterranean range.
there are a number of conditions I won't name but similar treatments with a similar result in HCT but those patients aren't being drained like this. Too, people living at elevation that high higher HCT/Etc numbers, they're not being drained, either.
More to the point, PCV is just misdiagnosed here. PCV is an increase in all blood factors...not just HCT., etc. What is happening in TRT is an entirely benign Erythrocytosis...look it up. Also, platelets are the clotting and thickening factor in your blood, so consider those numbers.
Its food for thought/the more you know.