Herbs to fight fat and diabetes

Functional Foods and Nutraceuticals
February 2005

Obesity is a public health concern in the United States, and millions of people try to lose weight each year through diet, exercise, hypnotherapy, and other means. Being overweight stresses the body in various ways. People who are overweight have imbalances in their endocrine system that lead to insulin resistance and the metabolic syndrome. Insulin is a hormone responsible for moving carbohydrates, the principle energy source for the body, into cells where it can be utilized. When cells are unable to use insulin, blood sugar rises. When blood sugar is elevated and the cells are unable use the sugar to make energy, sugars are converted by the liver into fat. Botanical supplements can help restore insulin sensitivity and improve the metabolic syndrome.

Four plants that increase insulin sensitivity are mentioned in this article. They are fenugreek (Trigonella foenum-graecum), Gymnema (Gymnema sylvestre), banaba (Lagerstroemea spp.), and bitter melon (Momordica charantia). Fenugreek helps control blood sugar by stimulating the release of insulin, and is used extensively in the treatment of diabetes. Supplementing with 15 g/day fenugreek "significantly reduced glucose levels after meals" in one human study.

Gymnema is also called gur-mar, or "sugar destroyer." It has the interesting ability to temporarily wipe out the ability to taste sugar when placed on the tongue, and to control blood sugar levels when ingested. It is native to India, where it has been used in Ayurvedic medicine for centuries. Gymnema leaves reduce blood glucose and stimulate insulin secretion. Similarly, banaba leaf also reduces blood glucose. Unlike fenugreek and gymnema, however, banaba does not appear to increase insulin secretion. Rather, it increases the ability of the body to use the insulin it naturally produces. Banaba leaf contains corosolic acid, "reduced serum glucose in people with type 2 diabetes, but did not reduce serum glucose in healthy individuals." The recommended dose of banaba is 16–48 mg of corosolic acid daily. Animal studies have shown that banaba leaf reduces triglycerides, fat mass, serum insulin and urinary glucose excretion.

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(Accessed July 6, 2005).

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