From 3 years to 6 years, which fluoride supplementation option is listed?

• A. <0.3 ppm at 0.50 mg/day
• B. 0.6-1.0 ppm at 0.25 mg/day
• C. 0.3-0.6 ppm at 0.25 mg/day
• D. 0.3-0.6 ppm at 0.50 mg/day

Answer: (C)

Fluoride supplementation is chosen based on a child's age and how much fluoride is already in their drinking water. For kids from 3 to 6 years old, if the water fluoride level is in the moderate range of 0.3–0.6 ppm, the recommended additional fluoride is 0.25 mg per day. This pairing provides a small, appropriate boost to total fluoride intake to help prevent dental caries without risking fluorosis from overexposure during the years when teeth are forming.

The other options don’t fit this specific guidance for 3–6-year-olds with water in that 0.3–0.6 ppm range: one uses a higher daily dose that would be more than needed for this water level, and others pair with water ranges that would require either a different dosing or no supplementation at all.