Vitamin D3, or vitamin D drops, is recommended for 2 year old babies who take vitamin D drops as a whole capsule each time, without splitting the dose, and the medication should be taken as prescribed by a doctor. The main ingredient of vitamin D drops is vitamin D3, which is used to treat or prevent vitamin D deficiency, such as rickets. The instructions for Vitamin D Drops state that this product should be used by opening the capsule and dropping it into the mouth, or by chewing the capsule directly. Therefore, this product is not recommended for 2-year-old babies to divide a capsule into 2~3 times, and the whole capsule should be taken at once. Hypercalcemia, renal rickets with hyperphosphatemia, vitamin D hypervitaminosis need to be prohibited vitamin D drops. Vitamin D drops for 2-year-old babies should be used reasonably under the guidance of a doctor, do not self-medication or change the dose.