I have used dianabol without research and it caused problems, i gained much mass and strength but did not have the money for PCT, 2 months after I noticed i had a bilateral gynecomastia(only 1 breast). It was sore as shit and only a small lump developed. The soreness subsided and the lump is still there, barely noticeable. I have recently started taking P6 from GNC, I am wondering if after the cycle runs out using this product, will I have problems with estrogen build-up once again or since its "natural", will I have no problems with estrogen build-up and another bout of gynecomastia? thanks to all that answer!