Calcium and vitamin D are the cornerstone of Osteoporosis prevention Calcium requires the presence of vitamin D for maximum absorption Organic calcium from Oyster shell   Dosage: 1 capsule 3 x daily   Active per capsule: 625 mg Calcium Carbonate 125 I.U. Vitamin D 3   This product is manufactured under cGMP conditions in a cGMP approved facility.   Free From: Yeast, milk or dairy products, corn, wheat, gluten, rye or rice.   This product is Halaal certified