Each tablet of Hanleqi vitamin D drops is 400 international units of vitamin D3. Eating three tablets a day may be a little too much. It is suggested that one tablet per day/kloc-0 is enough, and the insufficient part can be obtained from food? You don't need to supplement too much vitamin D, you can take your child to the sun to supplement vitamin D. Parents should insist on vitamin D supplementation to avoid the symptoms of calcium deficiency and vitamin D deficiency in children.