Verbatim response from Perplexity
The main difference is that “bioidentical” hormones are chemically identical to the hormones your body makes, while standard HRT often refers to hormone treatments that may be synthetic or otherwise not identical in structure to human hormones.[4][7][9]
In practical terms:
- Bioidentical hormones are usually estradiol, progesterone, or testosterone made in a lab from plant sources and then formulated to match human hormones exactly.[4][7]
- Standard HRT includes FDA-approved products that may use synthetic hormones or non-human-derived hormones, though some standard products are also bioidentical; the term mainly describes the treatment category, not one single hormone type.[4][7][9]
- Compounded bioidentical hormones are custom-mixed by pharmacies, but they are less standardized and not as well regulated as FDA-approved products.[7][9]
What matters clinically is not just whether a hormone is “bioidentical,” but which hormone, at what dose, and in what form. Major medical sources say there is no good evidence that bioidentical hormones are safer or more effective than traditional hormone therapy overall.[1][7][9]
A few examples help:
- Estradiol can be bioidentical whether it is prescribed as an FDA-approved patch/pill or as a compounded product.[7][9]
- Conjugated equine estrogens and some synthetic progestins are not bioidentical.[1][4]
- Some evidence suggests progesterone may have different effects than synthetic progestins, but that is a difference between specific hormones, not proof that all bioidentical therapy is superior.[1]
If you want, I can also give you a simple bioidentical vs standard HRT comparison table or explain which options are FDA-approved vs compounded.