Maxi Cal is our calcium formula with magnesium and vitamin D3 in a vegetarian capsule to maintain strong bones and to support the proper functioning of the electrical impulses that control our muscles. Calcium is needed not just for strong bones and teeth but also for maintaining healthy hormone levels, neurotransmitters, and optimum heart function. Vitamin D3 is essential to maintain healthy blood levels of calcium and is necessary for healthy bones and teeth. Magnesium is needed to maintain healthy bone and muscle. It plays a role in making new cells and forming the cellular energy the body needs to function. Maxi Cal has a fine balance of calcium citrate and calcium carbonate for those people who have a delicate and sensitive digestive system. For optimum bone health, try Maxi Cal today.SAFE: Made in the USA, Manufactured in a GMP Certified Facility - Maxi Health Was Established in 1974. GLUTEN FREE, No Artificial Flavors, Colorings or Preservatives - Kosher Certified. MAY support bones later in life as it may help the body absorb calcium better. VITAMIN D3 is effective in bone mass maintenance. PURE & POTENT to support bones, teeth, muscle, and immune system with all natural ingredients.Best Sellers Rank: See Top 100 in Health & Household. : B002CVTXOE. Manufacturer: Maxi. Date First Available: January 8, 2006. Item model number: QMC9. Product Dimensions: 6 x 5 x 4 inches; 4.8 Ounces.