Skincare Oriental Botanicals Magnesium Excel (Lemon Lime Zing) Oral Powder 165g With bioavailable magnesium glycinate for normal muscle health, energy production and electrolyte balance after exercise. The adult body contains approximately 25g of magnesium, with 60% found in the bones, 26% in the muscle and the remainder in soft tissue and body fluids. Magnesium is involved in many important biochemical processes in the body, such as muscle function, cellular energy production, blood glucose metabolism and nerve conduction.