Yea mate,
I use ghb pretty regularly during cycle and the vitex agnus castus is reported to help with the reduction of prolactin which is reputed to hold some action in tissue, although im not a chemist and probably could not say for sure.
Ive had very mild puffy nips since 13 but i have managed to keep under control since then - and yes ive used it all yohimburn, proviron, agnus castus, tamoxifen, arimidex........blah blah! u get the picture.
but the best results ive had in reducing the signs of this is after a good bulking cycle where u can add muscle to the chest and stretch out puffy nips - let me know how u get on mate
JK.