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Head-to-head evidence comparison — which supplement is right for you?
Acetyl-L-Carnitine wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
10 of 13 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
2 of 2 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Acetyl-L-Carnitine and Sage have evidence — compare verdict strength side-by-side.
500-2000mg
Morning or early afternoon, With or without food
ALCAR powder or capsules
300–600 mg standardized extract daily
With breakfast, With dinner (split dosing)
Standardized extract (300–600 mg, 2.5% rosmarinic acid)
1-4 weeks
4-12 weeks
2-4 weeks
4–8 weeks
4–8 weeks
4–8 weeks
8–12 weeks
Acetyl-L-carnitine for the treatment of diabetic peripheral neuropathy
The Cochrane database of systematic reviews (2019) · Meta analysis · n=907
The risk of bias was high in both trials of different ALC doses and low in the other two trials.No included trial measured the proportion of participants with at least moderate (30%) or substantial (50%) pain relief.
Impact of Dietary Supplements on Clinical Outcomes and Quality of Life in Patients with Breast Cancer: A Systematic Review
Nutrients (2025) · Systematic review · n=45
Curcumin studies presented mixed results.
Effects of Carnitine and Coenzyme Q10 on Sperm Quality and Pregnancy Rates in Men with Unexplained Infertility: A Systematic Review and Network Meta-Analysis
Reproductive sciences (Thousand Oaks, Calif.) (2025) · Meta analysis
L-carnitine, coenzyme Q10 and L-carnitine + acetyl-L-carnitine significantly improved sperm quality parameters compared with placebo.
Systematic review of clinical trials assessing pharmacological properties of Salvia species on memory, cognitive impairment and Alzheimer's disease.
CNS Neuroscience & Therapeutics (2014) · Systematic review
Multiple clinical trials demonstrated improvements in memory and attention in healthy young adults following acute and chronic Salvia officinalis or Salvia lavandulaefolia administration.
Exploring the therapeutic impact of Salvia officinalis on lipid and oxidative stress markers in patients with polycystic ovary syndrome - a randomized placebo-controlled clinical trial.
BMC Complementary Medicine and Therapies (2025) · Rct · n=60
Women with PCOS receiving Salvia officinalis extract showed significant reductions in total cholesterol, LDL cholesterol, and triglycerides compared to the placebo group.
Salvia officinalis extract in the treatment of patients with mild to moderate Alzheimer's disease
J Clin Pharm Ther (2003) · Rct · n=42
Significant improvement in ADAS-cog and CDR-SB scores vs placebo (P<0.003)
Based on meta-analysis of 523 participants showing moderate effect (VAS reduction 1.20 points). High risk of bias noted in some trials. Effect size is conservative given study limitations.
Based on multiple RCTs showing improvements in word recall, working memory, and attention. Effects varied by specific cognitive domain and population. Most studies used standardized extracts.
AI-estimated from published studies. Interpret as directional guidance.
Acetyl-L-Carnitine has a higher evidence score (7/10 vs 6/10) and wins in 3 of 3 categories.
For sharpen focus, Acetyl-L-Carnitine has a higher relevance score (80 vs 70).
No known interactions between Acetyl-L-Carnitine and Sage have been documented in our database. However, always consult a healthcare provider before combining supplements.