15 of 128 Magnesium supplements for toddlers declare more per serving than the UL for ages 1-3
Of 128 on-market supplements labeled for children ages 1-3 that declare Magnesium, 15 (11.7%) list more per serving than the 65 elemental mg 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.