Gudmar (also called Madhunashini) is best known for its leaf extract to suppress the sweet receptors of the tongue. The active ingredient that causes this physiological reaction is gurmarin, a polypeptide made of 35 amino acids. Gymnemagenin, the main sapogenin in the leaves, yielded 3.9-4.6% of total Gymnemic acids. Gudmar extract is standardized to 40% gymnemic acid.