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How intermittent fasting affects women's hormones

Intermittent fasting changes key hormones in women — insulin, cortisol, estrogen, and more. Here's what the research shows and how to fast safely.

FastingInPractice Editors

Intermittent fasting can improve insulin sensitivity and support healthy hormone balance in women, but it also affects cortisol, estrogen, and reproductive hormones in ways that vary by individual. Done thoughtfully, fasting supports hormonal health. Done aggressively — or without enough food in the eating window — it can disrupt the cycle, raise stress hormones, and suppress thyroid function. Women need a more personalised approach than men. When researchers study intermittent fasting, they often use male subjects. The results — improved…

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