Highly ionizable coral calcium from the Caribbean with 2:1 ratio of calcium-magnesium. Our Coral Calcium is harvested 100% above-ground and is certified and Eco-Safe. We support the preservation of the natural eco-system of the coral reefs around the world. Emerald Labs is formulated and clinically validated by a well-respected licensed naturopathic medical doctor (N.M.D.) according to the highest standards of his medical practice. His expertise in nutrition, herbal and vitamin therapies, natural hormone replacement, and integrative medicine has resulted in a professional line of clinical-potency formulas directly accessible to our consumers. Emerald Labs products are: Raw Whole-Food Based Formulas for Enhanced Absorption and Bioavailability. Formulated by Dr. Mark Stengler. Therapeutic Doses with Clinical Results. 100% Additive-Free – No Magnesium Stearate. Gluten-Free Formulas. Purity Tested – cGMP Certified Facility. Every product in vegetable capsules. All Emerald Laboratories products are produced at Emerald Laboratories in our own cGMP-Certified Facility in Carson, CA. Emerald Laboratories has an "in-house" laboratory where all raw ingredients are tested.