Acetyl-L-Carnitine Research Reference

Catalog classification, reference sizes, lab math links, and source-backed data. Educational use only — not medical advice.

Researched for: mitochondrial energy and neurocognitive function

Amino Acids & Nutrients amino-acid PowderCapsule verified

Also known as: ALCAR

Quick Facts

Reference Sizes
500 mg capsules, 50 capsules, 100 capsules, 200 capsules, 100 g powder, 250 g powder
Storage
Store tightly sealed in a cool dry place after opening; follow the product label
Solubility
Freely water-soluble as HCl salt

Catalog Description

Acetyl-L-carnitine (ALCAR) is the acetylated ester of carnitine, crossing the blood-brain barrier more readily than carnitine itself. Shares carnitine's core fatty-acid-transport function and is additionally studied in neurological/cognitive research contexts given its CNS bioavailability.

Catalog descriptions reflect research context only. Not a medical claim or treatment recommendation.

Research Profile

Half-Life
Not well characterized as a standalone human PK value
Onset
Chronic repletion studied over weeks
Administration Routes (Research)
Oral

Reported Research Effects

Reported Research Side Effects

Data source: NIH Office of Dietary Supplements (carnitine family)

Reflects preclinical/research literature context only. Not a medical claim, dosing instruction, or treatment recommendation.

Route-Specific Research Protocols

Amounts and schedules are separated by administration route. Evidence badges distinguish labels, human studies, preclinical work, community reports, and evidence gaps.

Label / guideline Human study Community only Preclinical only Not established
Oral Human study only

500-2000 mg/day in divided doses

Frequency / timing
Daily
Duration / setting
Study-dependent
Technique
Oral
Evidence
Human study protocol

Context: ranges used in published cognitive and neuropathy research

Formulation: Oral-mucosal formulations are not dose-equivalent to injectable or topical formulations.

Route safety: Research-study protocol only; it is not an approved or individualized instruction and should not be extrapolated to another route.

Do not convert an amount between routes. Bioavailability, formulation, sterility, monitoring, and clinical context differ by route. Research-use context only; independently verify every cited source.

Research Notes

Current retail products commonly use 500 mg capsules in 50-, 100-, and 200-count bottles; bulk powder is commonly sold in 100 g and 250 g packs.

Supplementary research context only. Not medical advice or a treatment recommendation.

Sources

Office of Dietary Supplements - Carnitine — NIH Office of Dietary Supplements
https://ods.od.nih.gov/factsheets/Carnitine-HealthProfessional/
Dietary Supplements for Exercise and Athletic Performance (Health Professional Fact Sheet) — NIH Office of Dietary Supplements
https://ods.od.nih.gov/factsheets/ExerciseAndAthleticPerformance-HealthProfessional/

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Research Use Only. All content is for educational and research reference only. Not medical advice, a treatment recommendation, or guidance on human use. Compounds are not FDA-approved drugs unless specifically noted.

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