Compound Library

Supplement / Cognitive

Acetyl-L-Carnitine (ALCAR)

Acetylated L-Carnitine. Crosses the blood-brain barrier unlike standard L-Carnitine. Nootropic, neuroprotective, and mitochondrial energy support. Used for cognitive enhancement and peripheral neuropathy.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.
Reference dose500–2000 mg/day (divided doses)
Half-life4 hours
Risk flaglow
Regulatory noteReview required

Side effects and watch-outs

  • Insomnia/overstimulation if taken too late
  • GI distress
  • Nausea
  • Fishy odour (less than L-Carnitine)
  • May increase appetite
  • Generally well tolerated