A 4-year-old child lives in a non-fluoridated community (water fluoride below 0.3 ppm). According to the ADA/AAPD fluoride supplementation schedule, what daily supplemental fluoride dose is recommended?

For children aged 3-6 years in areas with water fluoride below 0.3 ppm, the recommended supplemental dose is 0.50 mg/day. (For ages 6 months to 3 years it is 0.25 mg/day, and for 6-16 years it is 1.0 mg/day.) A 4-year-old therefore receives 0.50 mg/day.Other options: 0.25 mg/day applies to the younger 6 months-3 years bracket, not a 4-year-old. 1.00 mg/day applies to ages 6-16 years. 0.20 mg/day is not a value on the supplementation schedule.Key exam takeaway: Fluoride supplementation schedule (water <0.3 ppm): 6 mo-3 yr = 0.25 mg; 3-6 yr = 0.50 mg; 6-16 yr = 1.0 mg.