Formulated by Hans Nieper, M.D. of Hannover, Germany, specifically for Advanced Research, Membrane Complex features 2-AEP of three important minerals for human health: calcium, magnesium and potassium. Each capsule delivers 20 mg of elemental calcium, 12 mg of elemental magnesium and 8 mg of elemental potassium. Made in the USA and manufactured exclusively for Advanced Research.