At 250mg, this **niacin** tablet is a pharmacologically active dose — enough to trigger the classic niacin flush within about 20 minutes, a warm, red tingling across your skin. That's the signature of nicotinic acid, the standard form in a plain niacin tablet like this. For energy and general vitamin B3 status, one tablet far exceeds what you need; the flush is harmless, just startling if you're not ready for it, and taking it with food eases it.

Where 250mg falls short is cholesterol: it sits below the 500–1,000mg range the lipid research used, so it's only a starting point if HDL and triglycerides are your target — and even those high-dose trials largely failed to show a real heart-disease benefit. Bottom line: more than enough B3 for energy, a low opening dose for cholesterol, and a guaranteed flush at this strength.