Bluebonnet Nutrition EarthSweet Chewables Calcium Magnesium & Vitamin D3 features three popular nutrients that play a role in bone health and development. Each serving delivers 400 IU of vitamin D3, 500 mg of calcium and 250 mg of magnesium. This formula also features natural orange and vanilla flavors. No milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, yeast, gluten, barley, rice or sodium.