Gymnema Sylvestre is helpful in the treatment of diabetes (naturesmedicine.eu)

Gymnema Sylvestre is specific herb to increase insulin production in pancreas. Helps to regulate blood glucose levels and enhances glucose tolerance. The leaf extracts contain gymnemic acid, which is known to inhibit hyperglycemia (increased sugar level in the blood).

The principle constituent of Meshashringi is gymnemic acid, which has anti-diabetic properties. It reduces excessive blood sugar.

It has also been shown to have a regenerative effect on pancreatic beta cells and is insulinotropic, which means it stimulates or affects the production and activity of insulin.

Meshashringi helps decrease the craving for sugar. It temporarily abolishes the taste of sugar and helps neutralize excessive sugar present in the body in diabetes mellitus.

Eating the fresh leaves numbs the taste buds to the sense of sweet or bitter Hence the name means 'sweet destroyer'. It also reduces appetite.