I have heard something about vitamin B-6 and progresterone but not sure. I know that you can find out more about on bodybuilding.com.
I would consider "Mesterolone"(proviron). This has specific effects on progesterone as well as some effects on lowering estrogen levels. This is your best bet for combating progesterone derived
AAS such as Nandrolone and
Trenbolone from having progesterone effects on the body. If you can find a good enough source you will be able to find liquid oral Mesterolone at a good price.