 For more than a decade, the Professional Supplement Center has been providing pharmaceutical grade vitamins and supplements to the public. Through our vast knowledge of the industry and manufacturing processes, we've developed our own line of high-quality professional grade vitamins and supplements. Handpicked by our qualified healthcare professionals, we present Magnesium citrate, required by every cell. Magnesium is crucial for metabolic functions, enzyme activity, and the maintenance of normal muscle and nerve function. If you have any questions about this product or any other products the Professional Supplement Center carries, please call, visit, or email us, and one of our knowledgeable staff members will be happy to assist you.