Alpha lipoic acid is a natural anti-oxidant that can help diabetics reduce symptoms of peripheral neuropathy. Preliminary studies suggest other uses. But our tests showed that two alpha lipoic acid supplements contained significantly less of this ingredient than promised on their labels. Tests in the past have also revealed problems with some alpha lipoic acid products.
In this Review, you'll get ConsumerLab's test results for sixteen alpha lipoic acid supplements as well as information about two products similar to those that passed testing. We'll tell you what to look for and what to look out for, so you'll understand the potential benefits and risks of alpha lipoic acid.
You need to subscribe to get all the test results and ConsumerLab.com's valuable recommendations. In this comprehensive report, you'll discover:
- Which products passed our tests and why.
- What alpha lipoic acid may do — and may not do.
- Suggested dosage.
- Cautions and potential side effects.

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