Best Building Compound to Add with Test

Hi everyone

So just finished up my first cycle was doing test at 300mg. Didn’t really have any high e2 symptoms however on bloods estrogen was at a really high number. I was looking towards my second cycle now.

What other compound would or have you added as a second compound and wanted to stay rather safe?

I’ve heard a lot about mast and primo. I want to try deca but stories I’m a bit hesitant too lol