B vitamins are closely linked in the metabolism and an isolated deficiency of individual B vitamins is rare. They are also involved as co-factors in practically all metabolic processes. Burgerstein B-Complex therefore contains all B vitamins and other micronutrients. Vitamin C acts as a radical scavenger to prevent oxidative damage in the cells, choline supports normal fat metabolism and magnesium promotes normal muscle function. Developed in Switzerland, manufactured in the USA.