High Quality Alpha Lipoic Acid Supplements

ALA is a water- and fat-soluble antioxidant that regenerates other antioxidants (vitamin C, vitamin E, glutathione) and supports mitochondrial energy production. It's most studied for diabetic peripheral neuropathy, insulin sensitivity, and oxidative stress.

Typical doses are 300–600 mg per day for general antioxidant support and up to 1,800 mg per day in clinical studies of diabetic neuropathy. R-ALA, the bioactive isomer, is dosed about half as much as the racemic mixture.

ALA absorbs best on an empty stomach. Take it 30 minutes before a meal or 2 hours after. Splitting larger doses (e.g., 300 mg twice daily) can improve tolerance and steady plasma levels.

Racemic ALA contains both R-ALA (the natural, bioactive form) and S-ALA (synthetic, inactive). R-ALA alone is roughly twice as bioavailable, so 300 mg of R-ALA approximates 600 mg of racemic ALA. R-ALA also has a longer plasma half-life. Look for stabilized R-ALA on labels.

Meta-analyses show small but statistically significant reductions in body weight (~1.5 kg) and waist circumference with 600–1,800 mg per day for 8–12 weeks. The effect is modest and works best alongside diet changes — ALA is not a standalone weight-loss tool.

ALA improves insulin sensitivity and can lower blood glucose. If you take metformin, sulfonylureas, or insulin, monitor glucose closely when starting and coordinate with your prescriber, since dose adjustments may be needed to avoid hypoglycemia.

ALA is generally well-tolerated. The most common side effects are mild stomach upset, skin rash, and a temporary metallic taste. High doses can theoretically lower B-vitamin (especially biotin) status, so some practitioners pair ALA with a B-complex during long-term use.

In randomized trials of diabetic peripheral neuropathy, symptom improvement (pain, numbness, paresthesias) typically appears within 3–5 weeks at 600 mg per day, with continued improvement through 6 months. Don't expect overnight effects.

There isn't enough safety data to recommend ALA during pregnancy or breastfeeding. Stick to food-first antioxidant strategies during this window unless your clinician specifically recommends ALA.

Avoid ALA if you have thiamine (B1) deficiency, untreated alcoholism, or are scheduled for surgery within two weeks. Use caution if you take thyroid medication — high-dose ALA can interfere with thyroid hormone activity in some studies.