Study materials
A natural, highly bioavailable, water-soluble, tasteless and odorless calcium-potassium salt of 60% HCA extract from Garcinia cambogia commercially known as Super CitriMax (HCA-SX), niacin-bound chromium supplement commercially known as ChromeMate (containing10% elemental chromium) and a standardized extract of Gymnema sylvestre extract commercially known as Gymnema (GSE, GYM-250) (containing 25% gymnemic acid) were obtained from InterHealth Nutraceuticals, Inc., (Benicia, CA). Unless stated otherwise, all other chemicals and reagents were obtained from Sigma Chemical Co. (St. Louis, MO) and were of analytical grade or the highest grade available.