[Lotus]

the abstract from http://www.ncbi.nlm.nih.gov/pubmed/14706564 says "GBE contains 24% of phytoestrogens, which is kaempferol, quercetin, and isorhamnetin." and that Ginkgo works more on ER-beta, than ER-alpha. ER-alpha is present in breast tissue, instead of ER-beta. The three chemicals can be looked up too at that website, but a good one was behind a paywall, and its abstract said very little about the results.

Antiestrogenic activities of Ginkgo biloba extracts.
http://www.ncbi.nlm.nih.gov/pubmed/16842996

Hmm, same author?, this one is from August 06, the first study is from January 04.

There's a few more but this one is a big deal.

The inhibitory effects of the standardized extracts of Ginkgo biloba on Aromatase activity in JEG-3 human choriocarcinoma cells.
http://www.ncbi.nlm.nih.gov/pubmed/23339036

lovely11,

I see that you're a new member so welcome, are you pursuing NBE?.

Oh btw, quercetin while being a phytoestrogens (flavonoids) it's also an Aromatase inhibitor, the same goes for Genistein.