 For more than a decade, the Professional Supplement Center has been providing pharmaceutical great 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 great vitamins and supplements. Handpicked by our qualified healthcare professionals, we present CalMac Pro 2-1. This vitamin and mineral complex provides highly bioavailable, gelated minerals and a 2-1 ratio of calcium to magnesium in support of healthy bone 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.