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ConsumerLab Tests Alpha Lipoic Acid Supplements and Selects Top Picks
White Plains, New York, August 9, 2023 —  Alpha-lipoic acid supplements may modestly improve insulin sensitivity and blood sugar control, reduce symptoms of peripheral neuropathy, and aid in weight control when combined with a low-calorie diet. However, amounts of the most active form of alpha lipoic acid, the R-form, are rarely listed on supplement labels.

To help consumers choose among products, ConsumerLab recently selected, purchased, and tested popular alpha lipoic acid supplements on the market to determine the amounts of R-form alpha lipoic acid they contained. The tests revealed that, while all of the products contained their claimed amounts of alpha lipoic acid, amounts of R-form alpha lipoic acid provided by the products ranged from 91 mg to over 300 mg per suggested serving. Only two products listed their amounts of R-form alpha lipoic acid on the label. The cost to obtain 100 mg of R-form alpha lipoic acid from products ranged from 5 cents to 34 cents.

Among Approved products, identified two as its Top Picks for providing the best quality and value.

The results are available online now in ConsumerLab's new Alpha Lipoic Acid Supplements Review, which includes test results and comparisons for seven products. Six products were selected for testing by ConsumerLab: Alpha Lipoic Acid (ALA), Jarrow Formulas R-Alpha Lipoic Acid + Biotin, Life Extension Super R-Lipoic Acid 240 mg, Natrol Alpha Lipoic Acid, Puritan’s Pride Alpha Lipoic Acid 200 mg, and Vitacost Alpha Lipoic Acid. One additional product passed the same testing and was Approved through CL's voluntary Quality Certification Program: GNC Alpha-Lipoic Acid.

The review summarizes the clinical evidence for and against alpha lipoic acid for improving insulin sensitivity and blood sugar control, reducing symptoms of peripheral neuropathy, aiding weight loss, and other proposed uses such as treating hearing loss and improving aging skin, as well as dosages shown to be effective. It also explains the difference between the R-form and mixed chemical forms of alpha lipoic acid, which forms have been most studied in clinical trials, and whether it’s worth paying more for products containing only the R-form. The review also discusses the best way to take and store alpha lipoic acid supplements, and potential side effects and drug interactions. A video with expert tips for selecting the best alpha lipoic acid supplements is also available.

Founded in 1999, is a leading provider of consumer information and independent evaluations of products that affect health and nutrition. Membership to is available online and provides immediate access to continually updated reviews of nearly every popular type of dietary supplement and health food, answers to reader questions, and product recalls and warnings. ConsumerLab also provides independent product testing through its voluntary Quality Certification Program. The company is privately held and based in New York. It has no ownership from, or interest in, companies that manufacture, distribute, or sell consumer products.


Alpha-Lipoic Acid Tips From ConsumerLab



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