What is alpha-lipoic acid and what does it do? Alpha-lipoic acid (also called lipoic acid or, in its natural form, R-alpha-lipoic acid) is an antioxidant that assists the body in the conversion of glucose to energy. It seems to reduce symptoms of peripheral neuropathy in people with diabetes, and may help control blood sugar. It has other potential benefits, including improving skin appearance, but the evidence for many of these uses is only preliminary or mixed.
Over the years, ConsumerLab.com has found a small percentage of alpha lipoic acid supplements to contain less ingredient than listed on labels. Results were better in our most recent tests, although one product failed to pass our review due to improper labeling. Most startling was the range in prices and the cost to get an equivalent dose of alpha lipoic acid. For example, the cost of a 600 mg dose of alpha-lipoic acid could be as little 12 cents to over $1.20 – ten times as much!
In this comprehensive report about alpha-lipoic acid supplements, you'll get test results and quality ratings for 17 alpha-lipoic acid products (including 7 that passed our Voluntary Certification Program) and information about a supplement similar to one that passed testing. You'll learn:
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- Which alpha-lipoic acid supplements passed or failed testing
- Which alpha-lipoic acid supplements are lowest cost
- What alpha-lipoic acid can and cannot do for your health
- How R-alpha-lipoic acid differs from mixed isomer alpha-lipoic acid
- The dose of alpha-lipoic acid for different applications
- The potential side-effects of alpha-lipoic acid and other concerns, including drug interactions