Vitamin D3 (cholecalciferol) originally comes from animal sources such as wool fat, and is the form used in this supplement. D3 is the most common form in supplements.

RRR-alpha-tocopherol is the natural, biologically active form of vitamin E. This form is also found in vegetable oils, nuts and seeds. It is a standardized variant that remains highly stable in supplements.

Folic acid is the synthetic form of folate, which is often used in supplements because it is stable and well-absorbed.

Many children's multivitamins deliberately do not contain iron. That's because iron in supplement form can pose risks if dosed incorrectly, especially for young children. If there is a specific need, iron is usually given separately.

Inositol is a carbohydrate-like substance naturally found in fruits, grains and beans. It is sometimes added to children's multivitamins as part of the B-vitamin complex, although technically it is not a vitamin.