Calcium and magnesium are nutrients necessary for the formation of bones and teeth. Magnesium is a nutrient necessary for maintaining normal blood circulation, as well as helping the normal function and energy production of many internal enzymes. Vitamin D is a nutrient that promotes the absorption of calcium in the intestinal tract and aids in bone formation. ?Precautions: 1. Please keep out of reach of young children. 2. Do not use parts such as eye mucosa. 3. Do not use if there is a wound or a red, swollen or puncture. 4. Do not rub your eyes if you enter your eyes. Rinse with water. If you feel unwell, seek medical attention as soon as possible. 5. In order to avoid eating and maintaining quality, please do not exchange with other containers. 6. If there is any rash, redness, itching, irritation, pain, heat or peeling during use, please stop using it. If it does not improve after using it, please stop using it and ask the pharmacist or doctor.