Summary
JJ Virgin interviews Kate Vazquez, a functional medicine physician assistant and author of "Estrogen is a B*tch," about the three types of estrogen dominance and their far-reaching effects on women's health. Kate shares her personal story of developing hormonal imbalance after coming off 15 years of birth control, which led her to functional medicine and eventually to treating thousands of women with similar patterns. The episode identifies three distinct patterns of estrogen dominance: normal progesterone with elevated estrogen, low progesterone with normal estrogen, and the most common pattern of low progesterone combined with high estrogen. Kate walks through the five telltale symptoms including irregular periods, heavy bleeding with clots, severe PMS and menstrual cramps from excess prostaglandin production, breast tenderness from estrogen-driven tissue swelling, and weight gain concentrated in the butt, hips, and thighs. The discussion explores how cortisol, insulin, and thyroid hormones interact with estrogen dominance. Chronic stress diverts hormone precursors away from progesterone production toward cortisol. Excess estrogen stimulates thyroid-binding globulin (TBG), which binds up free thyroid hormones and creates hypothyroid symptoms. Fat cells produce additional estrogen, creating a vicious cycle with insulin resistance. Kate emphasizes that 80-90% of women may have some degree of estrogen dominance and that these symptoms should not be dismissed as normal.
Key Points
- Three types of estrogen dominance: high estrogen with normal progesterone, normal estrogen with low progesterone, and high estrogen with low progesterone (most common)
- Five telltale symptoms: irregular periods, heavy periods with clots, severe PMS and cramps, breast tenderness, and weight gain in butt/hips/thighs
- Excess prostaglandin release from high estrogen causes debilitating menstrual cramps and inflammation
- Chronic stress diverts cholesterol-based hormone precursors from progesterone production to cortisol production
- Excess estrogen stimulates thyroid-binding globulin (TBG), which binds up free T3 and T4, creating hypothyroid symptoms
- Fat cells produce estrogen, creating a vicious cycle between weight gain and estrogen dominance
- 80-90% of women may have some degree of estrogen dominance
- Optimal luteal phase progesterone should be 15-25; estrogen in that phase should be around 100-150, not 200-300
Key Moments
Three types of estrogen dominance patterns
Kate identifies three patterns of estrogen dominance: normal progesterone with high estrogen, low progesterone with normal estrogen, and the most common pattern of low progesterone with high estrogen. Optimal luteal phase progesterone should be 15-25.
"What it really, really means is that there's an imbalance in the ratio of estrogen and progesterone in our body"
Five telltale symptoms of estrogen dominance
The five key signs are irregular periods, heavy periods with clots, severe PMS and menstrual cramps from excess prostaglandins, breast tenderness from estrogen-driven tissue swelling, and weight gain in the butt, hips, and thighs.
"if women are soaking through their pads, their tampons, changing the cup multiple times through it in the day, especially the first few days, that's not normal. Like, really heavy periods not normal."
Stress diverts progesterone precursors to cortisol
Chronic stress activates the sympathetic nervous system and diverts cholesterol-based hormone precursors from progesterone production to cortisol, directly contributing to estrogen dominance. Excess estrogen also stimulates thyroid-binding globulin, reducing available thyroid hormone.
"cortisol and our sex hormones are all made from cholesterol. So, when our body is under stress, it's thinking survival and is producing more cortisol. It's not thinking reproduction"
