Each B vitamin becomes a coenzyme that runs one kind of reaction — and when it runs short, a specific deficiency follows. Wire up the matches, then calculate niacin equivalents from food.
The wiring diagram
Lines appear as you make each correct match.
Match the B vitaminstap a vitamin, then tap its partner
B vitamin
Coenzyme
How it worksPick a vitamin on the left, then tap the coenzyme it becomes on the right. Get all eight, then switch to Deficiency. Every match reveals the full triad and the strength of the evidence behind it.
Niacin (vitamin B3) reaches the body two ways: as preformed niacin in food, and made from the amino acid tryptophan — about 60 mg tryptophan → 1 mg niacin. Both are added up as niacin equivalents (NE). Drag to see the total.
Preformed niacin from food mg / day12
Tryptophan from food mg / day300
Total niacin equivalents
17.0 mg NE
Reading the barThe dashed line is the RDA (recommended dietary allowance) for adults 19+; the shaded band beyond 35 mg marks the tolerable upper intake level, which applies to niacin from supplements and fortified foods, not to niacin made from tryptophan in whole foods.