Swanson Flush Free Niacin 500 Milligrams, 240 Capsules

Our verdict

Swanson Flush Free Niacin 500 Milligrams, 240 Capsules works out to $0.12 per serving of vitamin b3 (niacin), at 500mg per serving in capsule form. That puts it below the median of the 92 vitamin b3 (niacin) products we can price per dose, where the typical serving costs $0.13, a Value Index of 1.0 where the median product is 1.0. One container lasts 240 days at the label dose of 1 serving a day, about $3.69 a month. We could not verify a third-party certification for Swanson in a public registry. Worked out from the current retail price as of 2026-11-13; confirm the live price on Amazon.com before buying.