Did you get down as far as this, JessM?
Bio-identicals are made from plant sources – usually wild yams or soya beans, and because they have an identical structure to the hormones our bodies produce, our bodies tolerate them. "Look at progesterone," said Gluck. "Doctors prescribe Provera, which is a progestin, not progesterone. Provera is a chemical substitute for a naturally occurring hormone, just as Premarin is a chemical substitute for oestrogen. These are drugs, not hormones, and like all drugs they have a side-effects profile."
She got out a pen and paper and drew me the molecular structures of bio-identicals versus synthetics. "Anyone can understand this. You can agree, disagree, argue, but you need the information. If not, so-called choice means nothing."
Criticisms that bio-identicals are unproven or unsafe are ignorant. Big Pharma manufactures its own bio-identicals and sells them under their proprietary brand names such as Testogel, Intrinsa, Estraderm, Vagifem, Utrogest, Oestrogel etc. These brands are made to a uniform prescription using the same tested and approved ingredients that a licensed compounding pharmacy will use to make an individual prescription that is balanced for each person's needs.
Doesn't sound like nonsense to me.