Below are natural Herbal Remedies for Polycythemia Vera that are used to treat this disease properly. Because Polycythemia Vera deals with the blood cell count, enhance in cancer risk, and interfere with bone marrow production, the following herbs directly get better these problems. Polycythemia Vera Herbal Treatment including garlic and cayenne aid in thinning the blood and preventing blood clots. Additionally, certain lifestyle measures are helpful treatment options.