This systematic review and meta-analysis pooled clinical studies of ketone supplementation in women with PCOS using inverse-variance random-effects models. Ketone supplementation was associated with a significant reduction in BMI (IV -13.08; 95 percent CI -17.47 to -8.69; I2 = 0 percent), serum glucose (IV -10.83; I2 = 93 percent) and insulin (IV -11.87; I2 = 93 percent). The reduction in cholesterol was not statistically significant (P = 0.19), LH and androgen levels fell significantly, and FSH and estrogen levels rose significantly.
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