Hello Rod @rtvin53, I see you have been a member for a few months but this is your first post so I would like to welcome you to Connect. I'm not sure this is the information you are looking for but most over the counter Alpha Lipoic Acid brands contain both the synthetic (S- ALA) and the active (R-ALA). The R-form of alpha-lipoic acid is the active, natural form. The S-form occurs when alpha lipoic acid is synthetically manufactured, creating both the S-form and the active R-form. If the label doesn't specify R-ALA, then it more than likely is part S-ALA and not as effective for treatment. Here are some good references that provide more information on ALA.

- Alpha Lipoic Acid: http://lpi.oregonstate.edu/mic/dietary-factors/lipoic-acid
- Different Forms of Lipoic Acid: What You Need to Know: https://geronova.com/consumers/different-forms-of-lipoic-acid/
- Diabetic neuropathy: Can dietary supplements help?: https://www.mayoclinic.org/diseases-conditions/diabetic-neuropathy/in-depth/diabetic-neuropathy-and-dietary-supplements/art-20095406

You might also be interested in the following discussions to learn what others have shared:
- Supplement recommendations: What can help neuropathy?: https://connect.mayoclinic.org/discussion/supplement-recommendations-can-help/
- Diabetic Neuropathy progressing?: https://connect.mayoclinic.org/discussion/diabetic-neuropathy-progressing/
- Have you tried the new Protocol 525 product for neuropathy relief?: https://connect.mayoclinic.org/discussion/have-you-tried-the-new-protocol-525-product-for-neuropathy-relief/

Are you currently taking any supplements to help with your diabetic neuropathy?