Conclusion: These results may suggest that weight loss, together with the psychosomatic component of the disease, should be taken into account. Therefore, although dietary aspects appear to be a promising complementary approach to the treatment of FM, further research is needed to provide the most effective strategies for the management of FM.
PubMed 32825400 ↗ALCAR (acetyl-L-Carnitine)
People mainly take ALCAR (acetyl-L-Carnitine) for focus, energy, performance. Based on 7 first-hand reports and 38 meta-analyses & systematic reviews in the medical literature. Ranked #980 of 1,974 overall.
Of reports that state an outcome, 50% are positive.
What ALCAR (acetyl-L-Carnitine) 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.
At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.
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 ↗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 ↗Conclusion: Low-quality evidence from two small trials showed that when compared to placebo, LAC may not improve intellectual functioning or hyperactive behaviour in children with FXS.
PubMed 25985235 ↗Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“ALCAR 500 mg”
“ALCAR does the same thing [as lion's mane regarding NGF].”
“I take 200-300mg of Alcar, and 50-80mg of cdp. After 5mins my brain feels like it's being charged up”
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