Vitamatic L-Theanine 200 mg with Caffeine 100 mg, 120 Tablets

Our verdict

Vitamatic L-Theanine 200 mg with Caffeine 100 mg, 120 Tablets works out to $0.08 per serving of l-theanine, at 200mg per serving in tablet form. That puts it below the median of the 30 l-theanine products we can price per dose, where the typical serving costs $0.17, a Value Index of 2.0 where the median product is 1.0. One container lasts 120 days at the label dose of 1 serving a day, about $2.50 a month. We could not verify a third-party certification for Vitamatic 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.