Study on the Sex-specific, Lipid- and Lipoprotein-lowering Effects of Berberine

The overall aim of the project is to assess the sex-specific effects of berberine on lipids, apoA1, apoB, and Lp(a). Specifically, the objectives of the project are to 1) assess the effect of berberine on lipids (total cholesterol, LDL-cholesterol, HDL-cholesterol, non-HDL cholesterol, and TG), lipoproteins (apoA1, apoB, and Lp(a)) and sex hormones by conducting a randomized, parallel, double-masked, placebo-controlled trial of berberine RCT in women; 2) assess the effect of berberine on apoA1, apoB, Lp(a) and sex hormone binding globulin (SHBG) in men using stored samples from our completed RCT of berberine in men; 3) assess whether the effects of berberine on lipids, lipoproteins and sex hormones differ in men and women.

This is a randomized, parallel, double-blinded, placebo-controlled trial of berberine in 100 Chinese women with hyperlipidemia in Hong Kong.

Participants will be randomized to two arms in which half of the participants will receive berberine (500 mg orally twice a day) and the other half will receive placebos (500 mg orally twice a day) for 12 weeks. Blood samples will be taken at baseline, 8-week and 12-week intervention.

The investigators will use an intention-to-treat analysis. Changes in lipids and lipoproteins after 8- and 12-week treatment will be assessed using analysis of variance and generalized estimating equation (GEE) model accounting for measurements at both time points.

Inclusion criteria

• Women, who are:

• aged 20 to 65 years.
• of Chinese ethnicity.
• with hyperlipidemia, defined as TG greater than 150 mg/dl (1.70 mmol/L), total cholesterol greater than 200 mg/dl (5.16 mmol/L), and/or LDL-cholesterol greater than 100 mg/dl (2.58 mmol/L).
• willing to make return visits.
• not currently receiving hormone replacement therapy or medications/pills containing hormones (such as hormonal contraception or hormone replacement therapy) in the past 12 months.
• not currently taking berberine or nutraceuticals that contain berberine.
• free of any congenital diseases, including familial hypercholesterolemia.
• free of Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency. G6PD will be tested using G6PD rapid diagnostic tests.
• free of hemolytic anemia.
• free of any infectious diseases, e.g., seasonal influenza.
• without liver/renal diseases.
• not pregnant or planning to get pregnant in the next three months. Pregnancy will be ruled out using HCG ULTRA pregnancy tests.
• not currently breastfeeding.

Exclusion criteria

• All men, and women who did not meet the aforementioned inclusion criteria and/or were unable or unwilling to provide consent.