R-Lipoic Acid Suppliers & Bulk Manufacturers

Available Forms: Capsules

Available Strengths: 50 mg, 100 mg, 150 mg, 300 mg

Reference Brands: -

Category: Nutraceuticals

R-lipoic acid capsules, 50 mg to 300 mg, containing the R-enantiomer of alpha-lipoic acid as free acid or a stabilised salt. For supplement importers, distributors and pharmacy chains who need enantiomeric purity data.

Product Description:

R-lipoic acid is the R-enantiomer of alpha-lipoic acid, also called thioctic acid, a small sulphur-containing fatty acid. The body makes the R form itself and uses it as a cofactor for mitochondrial enzymes such as pyruvate dehydrogenase. Most low-cost alpha-lipoic acid is a racemic 50:50 mix of R and S forms, so a pure R product is a distinct ingredient. This page lists capsules at 50 mg, 100 mg, 150 mg and 300 mg.

Free R-lipoic acid melts at a low temperature and tends to polymerise when warmed, which is why many products use a stabilised sodium salt instead. Check which form is used and whether the label amount is stated as free acid. The quality points that matter are R-enantiomer purity by chiral HPLC, assay against label claim, heavy metals, residual solvents and microbial limits. Racemic thioctic acid is authorised as a medicine in some European markets, but R-lipoic acid capsules are normally sold as food supplements, with category and permitted daily amount varying by market.

Sourcing notes. Ask for a certificate of analysis per batch showing assay, enantiomeric purity, heavy metals and microbial counts, and a GMP or food safety certificate for the finished-product site. Because the material is heat-sensitive, request the real-time stability data behind the shelf life, including 30 °C and 75% RH for zone IVb markets Amber glass or HDPE bottles with induction seals and a desiccant suit it better than blisters. Confirm capsule shell (gelatin or HPMC), strength, count and label language in your enquiry.