Cost

The cost of vitamin C treatment depends on the dosage selected. A bottle of 100 tablets at 1,000 mg (1 g) can cost anywhere from $5 to $20, depending on the quality of the ingredients and the store. The study showing positive effects on behavior used vitamin C donated from a pharmaceutical supply company (Hoffman-LaRoche). Vitamin C supplements may contain sodium, calcium, magnesium, potassium, or zinc ascorbates (salts) of ascorbic acid ⁽⁴⁾; ask your child's pediatrician which form is best for your child. Vitamin C supplements can also be found online, sometimes at a discount.