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What Ozempic is doing to women's hormones and why your doctor may not mention it
Rapid fat loss from GLP-1 drugs may lower estrogen and intensify sleep, mood and hot flash symptoms in women, researchers said.
Chief Medical Officer Jessica Duncan of Ivim Health says prescribers often focus on metabolic outcomes, frequently missing the intersection between GLP-1s and hormonal health in women starting treatment.
As ovarian production declines during perimenopause, fat tissue produces estrogen through the enzyme aromatase; rapid weight loss from GLP-1s can accelerate hormonal shifts already in motion.
A 2025 review in Endocrinology found women experience greater weight loss and higher rates of side effects than men on GLP-1s, while Sleep Medicine Reviews linked estrogen declines to sleep disruption.
Treating both systems together produces better results than treating either one in isolation, Duncan says, suggesting that weight loss and hormonal health are not two separate conversations for women.
Women in their late 30s through 50s should ask providers whether hormonal markers like FSH should be monitored before starting GLP-1s, ensuring hormonal baselines are established and tracked throughout treatment.