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Head-to-head evidence comparison — which supplement is right for you?
Alpha Lipoic Acid wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
13 of 14 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
3 of 4 studies with measurable effects showed benefit.
Top outcomes
300-600mg
On empty stomach for best absorption, 30-60 minutes before meals
R-Alpha Lipoic Acid (R-ALA) — the natural form
1000-2000mg
Morning, With or without food
Calcium alpha-ketoglutarate powder or capsules
4-12 weeks
4-8 weeks
2-4 weeks
4-6 months
4-8 weeks
Effects of Oral Alpha-Lipoic Acid Treatment on Diabetic Polyneuropathy: A Meta-Analysis and Systematic Review
Nutrients (2023) · Meta analysis · n=1242
ALA treatment produced favorable results for TSS (a dose-related trend was observed), NDS, and the global satisfaction score.
Effects of selected dietary supplements on migraine prophylaxis: A systematic review and dose-response meta-analysis of randomized controlled trials
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology (2025) · Meta analysis
In adults, compared with placebo, these supplements did not significantly affect other outcomes, and omega-3 supplementation did not yield a statistically significant reduction in any of these outcomes.
The Effect of Dietary Supplements on Male Infertility in Terms of Pregnancy, Live Birth, and Sperm Parameters: A Systematic Review and Meta-Analysis
Nutrients (2025) · Meta analysis · n=50
This study found no convincing evidence of an effect of any dietary supplements on male infertility.
AKG and the aging epigenome
Nature (2022) · Preclinical
Regulates epigenetic enzymes
Recruitment evaluation of a gerotherapeutic randomized controlled trial testing alpha-ketoglutarate in biologically older, middle-aged adults (ABLE)
Experimental gerontology (2025) · Rct · n=120
Eligibility rates were 80.3 % at pre-screening and 67.3 % at screening, with a consent rate of 66.1 %.
Effects of Multi-Ingredient Pre-Workout Supplement and Caffeine on Bench Press Performance: A Single-Blind Cross-Over Study
Nutrients (2022) · Crossover · n=15
In a cross-over manner, they participated in two sessions where they were blinded to the order of supplementation they were given: either a MIPS including caffeine or caffeine alone.
Based on multiple meta-analyses showing dose-related trends for TSS improvement. 600mg/day most studied dose with significant benefit vs placebo in 73% of studies. Limited data on doses above 600mg.
Based on single RCT (n=40) showing prevention of performance decline in track athletes. Effect was prevention of countermovement jump height decrease rather than enhancement. Limited evidence from one small study.
AI-estimated from published studies. Interpret as directional guidance.
Alpha Lipoic Acid has a higher evidence score (9/10 vs 8.5/10) and wins in 2 of 3 categories.
For metabolic health, Alpha Lipoic Acid has a higher relevance score (90 vs 70).
No known interactions between Alpha Lipoic Acid and Calcium AKG have been documented in our database. However, always consult a healthcare provider before combining supplements.