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News-ConsLab Theanine

by | Nov 1, 2015

Post Categories: Healthy Aging Practices | Supplements

Feeling Stressed? ConsumerLab.com Reviews the Evidence for L-Theanine and Tests Popular Products

L-theanine is often promoted to reduce stress, and for conditions such as ADHD – but does it really work? ConsumerLab.com recently reviewed the evidence and purchased popular brands of L-theanine to test their quality. While products selected for testing contained their claimed amounts of L-theanine and met other quality criteria, they differed significantly in dose and price, with some high-quality supplements costing nearly one-third less than other brands.
The test results and quality ratings appear online in ConsumerLab.com’s new L-Theanine Supplements Review.1 The report covers eight products selected by ConsumerLab.com and three others that passed the same tests in ConsumerLab.com’s voluntary Quality Certification Program. Also included is one product similar to one that passed testing but is sold under a different brand name. The report discusses the evidence for L-theanine and doses that have been found to be effective in clinical studies. Information about safety, side effects, and potential drug interactions is also presented.
The following products are included in the report: Bluebonnet L-Theanine, Country Life L-Theanine, Jarrow Formulas L-Theanine 200, Life Extension L-Theanine, NOW L-Theanine Double Strength, Puritan’s Pride L-Theanine, Solgar L-Theanine, Source Naturals L-Theanine, Swanson Ultra Suntheanine, Thorne Research Theanine, TwinLab L-Theanine Dots and Vitamin World L-Theanine.

Founded in 1999, ConsumerLab.com is a leading provider of consumer information and independent evaluations of products that affect health and nutrition. Membership to ConsumerLab.com is available online and provides immediate access to reviews of more than 1000 products from over 400 brands. The company is privately held and based in Westchester, New York. It has no ownership from, or interest in, companies that manufacture, distribute, or sell consumer products. 

Notes

  1. Product review: L-theanine supplements review [Web page]. ConsumerLab.com. https://www.consumerlab.com/reviews/L-Theanine-Supplements-Review/L-Theanine.

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