https://www.verywellhealth.com/polycythemia-vera-diet-5204993
The disease is not caused by dietary factors, and it cannot be reversed or managed with any specific diet. However, if you have polycythemia vera, it is important that you understand that many serious complications can be exacerbated by certain foods. You need to consider dietary issues to make sure that you eat in a way that helps minimize your risk of polycythemia vera complications.
https://blood-cancer.com/living/polycythemia-vera-diet
Both my hematologist and PV specialist agreed, emphasizing that food iron consumption really doesn’t make that much of an impact on red blood cell production.