Liver metabolism during treatment with estradiol and progesterone

• Serum concentrations of sex hormone-binding globulin (SHBG), corticosteroid binding globulin (CBG), ceruloplasmin, lipoprotein A and liver enzymes were measured in 30 postmenopausal women treated with 2 mg micronized 17 beta-estradiol daily and micronized progesterone orally in doses of 50, 100 and 200 mg daily, as progestogen supplementation. The treatment lasted for 4 months. The serum levels of SHBG and CBG increased during treatment and a weak association between progesterone dosage and CBG was observed. Levels of lipoprotein A and liver enzymes did not change. It is concluded that micronized natural progesterone is an attractive means of progesterone supplementation in postmenopausal hormone replacement therapy without any liver-related side-effects.

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