(Peak Performance) Perspirade is a unique herbal formula designed to support normal production of body fluids (sweat) that help cool the body and restore normal internal balance for horses with anhydrosis (non-sweaters). This proven herbal formula provides support for horses in high temperature, high humidity environments. Feed 1 gram per 100-150 lbs. body weight, divided into one am and one pm dose, daily with feed. Powder.