Alpha-Lipoic Acid

Also known as: ALA, lipoic acid, thioctic acid, r-lipoic acid, R-ALA

Grade B — Moderate Evidenceantioxidantmetabolic
300–600 mgOn empty stomach, 30 min before meals; R-form may be taken with food

Unique antioxidant active in both water and fat-soluble environments. Evidence for blood sugar regulation, neuropathy, and oxidative stress reduction. The R-form is more bioavailable. Useful for metabolic health and neuroprotection.

🧬Longevity⚡Energy🧠Cognitive Performance
Last reviewed: 2026-03-12

Quick Facts

Evidence

Grade B

Studies

1

Interactions

2

Forms

1

Evidence Rating: Grade B — Moderate Evidence

Some RCTs with positive results, or strong observational evidence. More research may refine our understanding.

Interaction Warnings

Diabetes medications (insulin, metformin)Moderate

ALA may lower blood sugar — combined use increases hypoglycemia risk. Monitor glucose closely.

Thyroid medications (levothyroxine)Moderate

ALA may affect thyroid hormone levels; separate dosing by 2+ hours.

Important Notes

  • R-ALA is the biologically active form; racemic ALA is most common in supplements
  • May cause GI upset at higher doses — start low
  • Can lower blood sugar significantly — diabetics should monitor closely
  • Rare cases of insulin autoimmune syndrome reported in susceptible individuals

Clinical Evidence (1 study)

Alpha-lipoic acid supplementation: a meta-analysis of randomized controlled trials

Hsieh RY et al. (2023) — Front Pharmacol

ALA supplementation significantly reduced fasting glucose, HbA1c, and markers of oxidative stress

View on PubMed

Alternatives to Consider

These supplements target similar goals and may be worth considering alongside or instead of Alpha-Lipoic Acid.

L-Carnitine

Grade B

Amino acid derivative critical for fatty acid transport into mitochondria. ALCAR crosses the blood-brain barrier for cognitive support. Good evidence for exercise performance and male fertility.

🧠 Cognitive Performance⚡ Energy🧬 Longevity

PQQ (Pyrroloquinoline Quinone)

Grade C

Stimulates mitochondrial biogenesis (creation of new mitochondria). Best paired with CoQ10. Still early research.

🧠 Cognitive Performance⚡ Energy🧬 Longevity

CoQ10 (Ubiquinol)

Grade A

Critical for mitochondrial energy production. Q-SYMBIO trial showed 43% cardiovascular mortality reduction in heart failure. Depleted by statins.

⚡ Energy🧬 Longevity

Related Supplements

PQQ (Pyrroloquinoline Quinone)

Grade C — Preliminary

Stimulates mitochondrial biogenesis (creation of new mitochondria). Best paired with CoQ10. Still early research.

L-Carnitine

Grade B — Moderate Evidence

Amino acid derivative critical for fatty acid transport into mitochondria. ALCAR crosses the blood-brain barrier for cognitive support. Good evidence for exercise performance and male fertility.

Iodine

Grade A — Strong Evidence

Essential trace mineral for thyroid hormone synthesis. Critical for metabolic rate and cognitive development. Most people get enough from iodized salt — test before supplementing.

Shilajit

Grade B — Moderate Evidence

Mineral-rich resin from Himalayan rock. Contains fulvic acid and 80+ trace minerals. Promising evidence for testosterone, mitochondrial function, and cognitive health. Quality and purity are critical.

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⚕️ Important Disclaimer

This information is for educational purposes only. It is not medical advice. Always consult a healthcare provider before starting any supplement regimen, especially if you take medications or have health conditions.

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