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Estrogen
Losing as little as 5% of your body weight can have a positive effect on estrogen levels. Fat tissue is hormonally active and produces estrogen. When the body carries excess fat, estrogen levels can rise higher than they should, which may cause exacerbated PMS symptoms. Marla Ahlgrimm says that weight loss can improve menstrual cycle regularity and may reduce heavy periods and painful cramping.
Insulin Sensitivity
When the body carries excess weight, it can become resistant to insulin. Marla Ahlgrimm explains that this means the body has to produce more insulin to keep blood sugar levels stable. With weight loss, insulin levels may decrease, and blood sugar can become more stable. Many women also report more consistent energy levels. Regulated insulin is especially important for women with Polycystic Ovary Syndrome.