Probably the worse thing you can put in your body is equip. It will thicken your blood like glue. Anadrol is bad too. It's all dose dependent though. I never had a problem with 200mg of test per week. hat's my TRT dose and all my vitals are good at that dose. Primo is relatively easy on the blood. Although deca has been regarded as somewhat easy on the RBC, I wouldn't experiment with Nandrolone on any level. Tren is bad too...It's rumored that Dbol can actually lower RBC, but I'm not convinced... I take aspirin which helps. It doesn't lower the RBC but it lowers the platelet count, helping control clotting. Donating blood is supposed to help, but my friend did that and his RBC was unaffected. It takes about 120 days for your RBC to return to normal after elevating it, so don't expect immediate results.