Rhonda Patrick· PhD
so if a woman is taking estriol which she's probably taking in a topical fashion in combination with um estral that they usually refer to that as a bi EST you'll hear that abbreviated biest which just means by estrogen so they'll combine in some fraction anywhere from 5050 to 802 estra diol with estriol and a woman will apply that topically but again that's not FDA approved that is something that compounding pharmacies would have to make for a physician