This product combines Vitamin C, calcium, magnesium, Vitamin D3, and Vitamin K2 to build a strong skeletal system, providing comprehensive protection for the body, bones, and nervous system. Vitamin C & Calcium: Ascorbic acid, antiviral, antioxidant, and more easily absorbed. Magnesium: Promotes the absorption of calcium and Vitamin D3. A 2:1 calcium-to-magnesium ratio is the optimal golden ratio, regulating muscle function. Vitamin D3: Regulates calcium absorption in the small intestine and the concentration of calcium in the blood. Vitamin K2: Often overlooked, it is closely related to heart disease and osteoporosis, optimizes calcium absorption, and is responsible for regulating calcium storage. Directions for use: Take 1-2 capsules 2-3 times daily with meals.