Nutrients lower lipid levels in obesity
Green tea extract
Earlier studies found green tea can reduce weight by helping the body manage lipids, doctors said. In this study, 46 otherwise-healthy obese men and women, aged 30 to 60, took a daily dose of 379 mg of green tea extract plus 208 mg of ECGC–the most common antioxidant found in green tea– or a placebo. Participants did not change their diets or physical activities during the study, which were similar for both groups.
After three months, compared to placebo, the green tea group saw significant decreases in total and LDL cholesterol, an increase in HDL cholesterol, lower triglycerides, body mass index, and smaller waist size. Total antioxidant activity also increased, and magnesium and zinc levels improved, with increasing magnesium levels helping lower or stabilize blood sugar. Iron levels declined. Explaining their findings, doctors said green tea may help keep cholesterol and glucose from being absorbed through the walls of the small intestine.
Obesity drugs often have serious side effects, and doctors are searching for natural products, such as the herb berberine, for safer answers. In this pilot safety study, obese people took 500 mg of berberine three times per day. After 12 weeks, berberine proved safe in preserving overall blood characteristics, and in maintaining heart, kidney, and liver function.
Beyond safety, berberine appeared to have additional benefits. Participants had lost an average of five pounds, a result doctors had expected. More surprising were a 12 percent decline in total cholesterol and a 23 percent decline in triglycerides. To reconfirm the lipids lowering effects of berberine, doctors conducted a lab animal study, which yielded similar results.
Reference: Biological Trace Element Research; May, 2012, Electronic Prepublication
From the December 2012 newsletter