64 of 138 Niacin (Vitamin B3) supplements for toddlers declare more per serving than the UL for ages 1-3
Of 138 on-market supplements labeled for children ages 1-3 that declare Niacin (Vitamin B3), 64 (46.4%) list more per serving than the 10 mg NE tolerable upper intake level for that age, per the 2026-01-16 DSLD dump. A UL is a conservative threshold, not a line above which harm is certain.