PlainPill

ALCAR

People mainly take ALCAR for focus, energy, mood. Based on 151 first-hand reports and 46 meta-analyses & systematic reviews in the medical literature. Ranked #325 of 1,974 overall.

33
User score
Mostly positive
24% positive7% mixed7% negative63% unclear

Of reports that state an outcome, 63% are positive.

Clinical research
AStrong research base
46
meta-analyses
86
RCTs
1,179
papers

What ALCAR does, according to users

Of the people who reported each effect, the share who said it got better.

What the research says

Systematic reviews and meta-analyses from PubMed, with their published conclusions.

AStrong research base

3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.

Cochrane Database Syst Rev · 2003 · Meta-analysis / systematic review
Acetyl-L-carnitine for dementia

Conclusion: There is evidence for benefit of ALC on clinical global impression, but there was no evidence using objective assessments in any other area of outcome. Given the large number of comparisons made, the statistically significant result may be due to chance. At present there is no evidence to recommend its routine use in clinical practice. Although the intention of the review was to access ALC for the treatment of all dementias, the included trials had confined themselves to participants with Alzheimer's disease. Individual patient data may add to the findings, as would trials including other type

PubMed 12804452 ↗
Nutrients · 2020 · Meta-analysis / systematic review
Dietary Interventions in the Management of Fibromyalgia: A Systematic Review and Best-Evidence Synthesis

Conclusion: Interpretation of these studies was limited due to the frequent poor quality of the study design, the wide heterogeneity between studies, the small sample size and a high degree of bias. Therefore, there is insufficient evidence to recommend any one particular nutritional intervention for the management of fibromyalgia and further research is needed.

PubMed 32878326 ↗
World J Biol Psychiatry · 2022 · Meta-analysis / systematic review
Clinician guidelines for the treatment of psychiatric disorders with nutraceuticals and phytoceuticals: The World Federation of Societies of Biological Psychiatry (WFSBP) and Canadian Network for Mood and Anxiety Treatments (CANMAT) Taskforce

Conclusion: Based on the current data and clinician input, a range of nutraceuticals and phytoceuticals were given either a supportive recommendation or a provisional recommendation across a range of various psychiatric disorders. However several had only a weak endorsement for potential use; for a few it was not possible to reach a clear recommendation direction, largely due to mixed study findings; while some other agents showed no obvious therapeutic benefit and were clearly not recommended for use. It is the intention of these guidelines to inform psychiatric/medical, and health professional practice

PubMed 35311615 ↗

Dosage people report

As stated by users — not a recommendation. Follow the label or your doctor.

1000 mgas reported
250 mgmorning and evening
1 gdaily
500 mg2x daily
500 mgwith noopept
500 mgdaily

Reported side effects

How often each side effect came up across all reports.

insomnia ×4irritability ×3mania ×2restlessness ×2depression ×2tingling ×1fatigue ×1jitteriness ×1

What users say

Verbatim quotes, shortened only — each links to the original discussion.

Other options for focus

User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate