NOW Supplements, L-Lysine 500 mg, Amino Acid, 100 Veg Caps

Our verdict

NOW Supplements, L-Lysine 500 mg, Amino Acid, 100 Veg Caps works out to $0.06 per serving of l-lysine, at 500mg per serving in capsule form. That puts it the cheapest quarter of the 54 l-lysine products we can price per dose, where the typical serving costs $0.09, a Value Index of 1.5 where the median product is 1.0. One container lasts 100 days at the label dose of 1 serving a day, about $1.80 a month. We could not verify a third-party certification for NOW 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.