What it is
Niacin sits among the better-understood B-vitamins in general nutrition science, with a well-documented role in normal energy-yielding metabolism and nervous system function. It's a low-controversy staple in men's daily formulas for exactly that reason — its function is well established, even where this particular product doesn't publish an exact milligram figure.
Where it sits in the formula
Vitamin B3 (Niacin) is one of eight ingredients named openly on the HoneyFil label — no vague "proprietary blend" wording anywhere. As with the rest of the formula, we don't attach a specific milligram figure to it, since that number isn't part of the publicly available material we were able to review; your bottle's Supplement Facts panel remains the accurate source.