PYY and polycystic ovary syndrome: also proved that butylated starch can activate GPR41 receptor in the colon of PCOS rats by releasing butyric acid, promote the secretion of PYY, reduce feed intake of PCOS rats, inhibit weight gain and LH secretion, and indirectly improve endocrine disorders and polycystic ovary pathology (31), which is consistent with our research results.