Cutting ALL soy from your diet (except for maybe some FERMENTED, ORGANIC soy), should greatly improve male breast issues.
Soy is in LOTS of things. Many men eat get a lot of it in protein bars, protein mixes, and other things, even Taco Bell beef is part soy.
Also anything that can mimic estrogens -- don't heat or drink from plastic, for instance. Many chemicals in cleaning products and other things can upset the balance.
I pray for healing. In Jesus name. Amen.