ALCAR (acetyl-L-carnitine)
Cognitive · Mitochondrial / cholinergic
Tier B-
Bottom line
Read Off Label grades ALCAR (acetyl-L-carnitine) as B- (6.3/10) based on moderate evidence, med benefit magnitude, and a low-med-risk safety profile.
Most robust cognitive evidence in older adults with MCI or early AD (Montgomery 2003 meta-analysis).
Studied, labeled, or reported-use context: 500-2000 mg/day PO — OTC; not individualized guidance.
What the evidence says
Most robust cognitive evidence in older adults with MCI or early AD (Montgomery 2003 meta-analysis). Widely studied for neuropathy. Modest effect sizes. Morning dosing is common because later dosing can disrupt sleep.
Mechanism
Acetylated L-carnitine crosses BBB efficiently; supports fatty acid transport into mitochondria; acetyl group donates to ACh synthesis; membrane stabilization
Studied, labeled, or reported dose & route
500-2000 mg/day PO
This records doses and routes described in studies, approved labeling, clinical practice, or documented use. It is not individualized guidance and does not establish safety; context changes with indication, formulation, health history, monitoring, and other medicines.
Citations
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Common questions
- What does the evidence show about ALCAR (acetyl-L-carnitine)'s effects?
- Read Off Label rates the evidence for ALCAR (acetyl-L-carnitine) as Moderate and the benefit magnitude as med, producing an overall grade of B- (6.3/10). Most robust cognitive evidence in older adults with MCI or early AD (Montgomery 2003 meta-analysis).
- What safety findings are reported for ALCAR (acetyl-L-carnitine)?
- ALCAR (acetyl-L-carnitine) has a low-med risk profile in the database. Low-Med (insomnia, agitation at high doses; seizure threshold caution in epilepsy) Legal status: OTC.
- What doses or routes are reported for ALCAR (acetyl-L-carnitine)?
- 500-2000 mg/day PO This is context from studies, approved labeling, clinical practice, or documented use; it is not individualized guidance and does not establish safety.
- How does ALCAR (acetyl-L-carnitine) work?
- Acetylated L-carnitine crosses BBB efficiently; supports fatty acid transport into mitochondria; acetyl group donates to ACh synthesis; membrane stabilization
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.