The simple answer is that niacin in this supplement isn’t necessary. Here’s why:
Children 1–10 yrs. need about 6–12 mg/day, and this is easily accomplished with a normal diet (and can also convert from tryptophan). Secondly, it only takes 10–20 mg/day of supplemental niacin to cause skin flushing, GI upset, and possible mild liver damage.
The Food and Nutrition Board sets the upper limit at about 10–15 mg/day for children 1–8 years of age. So it’s likely that if niacin were in this supplement, its RDA would be reached and easily exceeded (since Nordic Berries taste so good)!