Nattokinase is a type of probiotic that you can find online. It is in Miso soup and other fermented foods, and used for centuries by the Asian culture where strokes have been very low. It prevents what is called Rouleau formation, which is the adhering together of red blood cells, and reduces the chance of clotting and other thrombolytic effects which can lead to strokes and other cardiovascular events we all want to avoid. My hemocratic has bounced between 49 and 57 training here at 7000ft, despite therapeutic phlebotomy (giving blood every 30-60 days). It took 4-6 months to come down when I took a longer break two years ago and I believe it just took a while for the bone marrow to figure out that there was no longer a consistent message or signal to reduce RBC count, which was one of the primary purposes for the development of testosterone use many decades ago. Hope this helps, and look at the Natto. Cheap and a good way to reduce the risks of consistently higher crit levels.