The main ingredients of Ecocin vitamin AD drops are vitamin A and vitamin D3, which are used for the prevention and treatment of vitamin A and D deficiency. When using it for children, note that there are two sizes: one contains 1500 units (vitamin A) and 500 units (vitamin D3) for children under one year old in green capsules, and the other contains 2000 units (vitamin A) and 700 units (vitamin D3) for children over one year old in pink capsules. In addition, both vitamin A and D are essential for human growth and development, especially for the development of fetuses, infants and children, as well as for the integrity of epithelial tissues, vision, reproductive organs, constant blood calcium and phosphorus, and the growth and development of bones and teeth. However, care should be taken not to overdose, as this can lead to chronic toxicity.