from what i know its mainly used to fight P gyno. so when ppl go on deca or tren, they use winny coz it competes for receptors. personally, i wouldnt rely on it. i'd much rather stick to nolva, Adex, letro. keep in mind also, this is only theoretical, ive never met anyone that has tried this and validated it. on the contrary, ive spoken to people who have had problems with P gyno, incorporated winny as a AI and got no results. plus running winny just as an AI is way to expensive.