Vitamin B3 (as Niacin)
Disclosed exactly, which is what a panel is for. Niacin is a B vitamin the body uses in energy-yielding metabolism, and it is also a vasodilator — the reason large doses cause the familiar flush. The label prints the form only as “as Niacin”, and that word covers both nicotinic acid, which flushes, and niacinamide, which does not. At this amount a flush is unlikely either way, but if you are the kind of person who reacts to B-complex vitamins, the label does not tell you which one you are taking.