How to read this reference: Interference with a receptor does not automatically mean harmful or helpful — context is everything.
A few terms used throughout:
ER = estrogen receptor — the docking site where estrogen binds to trigger its effects in cells
ER+ = estrogen receptor positive — a cancer diagnosis where the tumor is fueled by estrogen signaling
PR = progesterone receptor — the docking site for progesterone
HRT = hormone replacement therapy — exogenous (outside the body) estrogen, progesterone, or testosterone
Estrogenic effect = the substance mimics or amplifies estrogen's action in the body
Blocks ER = the substance occupies the estrogen receptor without activating it, preventing the body's own estrogen from binding
Whether blocking or activating a receptor matters depends entirely on what is already happening in that body. Estrogen dominance, fibroids, estrogen receptor positive (ER+) cancer history, thyroid conditions, low androgens, or current hormone replacement therapy (HRT) all change how significant any entry on this list is. Many of these substances appear in products labeled "hormone balance," "female support," or "natural menopause." Labels do not disclose receptor activity. That's what this list is for.
A few terms used throughout:
ER = estrogen receptor — the docking site where estrogen binds to trigger its effects in cells
ER+ = estrogen receptor positive — a cancer diagnosis where the tumor is fueled by estrogen signaling
PR = progesterone receptor — the docking site for progesterone
HRT = hormone replacement therapy — exogenous (outside the body) estrogen, progesterone, or testosterone
Estrogenic effect = the substance mimics or amplifies estrogen's action in the body
Blocks ER = the substance occupies the estrogen receptor without activating it, preventing the body's own estrogen from binding
Whether blocking or activating a receptor matters depends entirely on what is already happening in that body. Estrogen dominance, fibroids, estrogen receptor positive (ER+) cancer history, thyroid conditions, low androgens, or current hormone replacement therapy (HRT) all change how significant any entry on this list is. Many of these substances appear in products labeled "hormone balance," "female support," or "natural menopause." Labels do not disclose receptor activity. That's what this list is for.
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