OH D3 Plus drops include a combination of vitamins, minerals, and amino acids. It is used as a supplement for children who are deficient in vitamin D3. It also aids in the absorption of calcium and phosphate from the intestines, which helps to maintain the health of bones and teeth. Vitamin C, vitamin B3, vitamin E, vitamin B5, vitamin B6, vitamin B2, vitamin B1, vitamin A, folic acid, vitamin D3, vitamin B12, zinc, iodine, L-lysine, DHA, and choline are the essential constituents of OH D3 Plus drops.