OnePin Peptide Library · Mitochondrial
Acetyl-L-Carnitine (ALCAR)
ALCAR · ALC · N-Acetyl-L-Carnitine
Acetyl-L-Carnitine (ALCAR) is the acetylated form of L-carnitine, a quaternary ammonium compound essential for fatty acid oxidation and cellular energy production. Endogenously synthesized from lysine and methionine, ALCAR readily crosses the blood-brain barrier (unlike standard L-carnitine which has limited CNS penetration), making it the preferred carnitine form for neurological applications. ALCAR is found in trace amounts in foods including red meat, dairy, and to lesser extent fish and poultry.,ALCAR's clinical applications span mitochondrial energy support, age-related cognitive decline, neuropathy (especially diabetic and chemotherapy-induced), and male fertility. The compound is one of the most-studied mitochondrial-cognitive supplements with 100+ RCTs across various indications. ALCAR is registered as a pharmaceutical in Italy and other EU countries for diabetic neuropathy, peripheral artery disease, and age-related cognitive impairment. The Italian product Branigen and Carnitine Levomega are pharmaceutical-grade ALCAR.,Beyond cognitive applications, ALCAR has demonstrated benefits for chronic fatigue (especially in older adults and post-stroke fatigue), depression in older adults (comparable efficacy to fluoxetine in some trials), male fertility (sperm motility and count improvement), and exercise recovery. ALCAR also supports the carnitine shuttle for fatty acid oxidation, theoretically aiding fat metabolism though weight loss claims are modest at best. Standard supplemental doses range from 500-3000mg/day, often split into 2-3 doses.
Take 30 min before meals on empty stomach for best absorption. Split 500-1500mg twice daily AM + lunch (avoid late dosing - can cause insomnia/activation in sensitive users). Pairs naturally with Alpha-Lipoic Acid, CoQ10, and PQQ for comprehensive mitochondrial support.
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
How it works
ALCAR's primary mechanism is delivery of bioavailable carnitine into cells (especially neurons) where it shuttles long-chain fatty acids across the inner mitochondrial membrane for beta-oxidation - a critical step in mitochondrial ATP production. The acetyl group on ALCAR provides additional acetyl-CoA equivalents that enter the citric acid cycle, supporting mitochondrial energy output. ALCAR also crosses the blood-brain barrier readily (unlike L-carnitine), supporting neuronal mitochondrial function.,ALCAR has direct cholinergic effects via acetyl group donation for acetylcholine synthesis (cholinergic component of cognitive support) and supports nerve growth factor (NGF) signaling - particularly relevant for the neuropathy applications. The compound stimulates protein kinase C signaling in neurons and modulates expression of genes involved in cellular stress response and longevity (including SIRT1/SIRT3 pathway interactions).,Additional mechanisms include modulation of monoamine neurotransmitters (dopamine, serotonin, norepinephrine - underlying antidepressant effects), reduction of oxidative stress in nervous tissue, support for sperm membrane fluidity and motility (fertility application), and modest GLUT4 upregulation supporting glucose handling. ALCAR also has chelating effects, binding excess copper - relevant for some neurodegenerative applications.
ALCAR's primary mechanism is delivery of bioavailable carnitine into cells (especially neurons) where it shuttles long-chain fatty acids across the inner mitochondrial membrane for beta-oxidation - a critical step in mitochondrial ATP production. The acetyl group on ALCAR provides additional acetyl-CoA equivalents that enter the citric acid cycle, supporting mitochondrial energy output. ALCAR also crosses the blood-brain barrier readily (unlike L-carnitine), supporting neuronal mitochondrial function.,ALCAR has direct cholinergic effects via acetyl group donation for acetylcholine synthesis (cholinergic component of cognitive support) and supports nerve growth factor (NGF) signaling - particularly relevant for the neuropathy applications. The compound stimulates protein kinase C signaling in neurons and modulates expression of genes involved in cellular stress response and longevity (including SIRT1/SIRT3 pathway interactions).,Additional mechanisms include modulation of monoamine neurotransmitters (dopamine, serotonin, norepinephrine - underlying antidepressant effects), reduction of oxidative stress in nervous tissue, support for sperm membrane fluidity and motility (fertility application), and modest GLUT4 upregulation supporting glucose handling. ALCAR also has chelating effects, binding excess copper - relevant for some neurodegenerative applications.
What to expect
Days 1-14: Subtle energy effects.
Evidence
Interactions & stacking
What's safe to combine, and what belongs in a separate pin.
Safe & synergistic
Keep separate
Pharmacokinetics
Storage. Store at room temperature (20-25C) in a cool, dry place. ALCAR HCl form is hygroscopic - keep tightly sealed. Capsules shelf-stable for 24+ months. Bulk powder may clump with humidity exposure.
Regulatory status
Classified as a dietary supplement in the US (no FDA pre-approval). Available widely over the counter. Prescription pharmaceutical in Italy and other EU countries for diabetic neuropathy and age-related cognitive impairment. Generally Recognized as Safe at typical supplement doses.
Put it to work
Calculate, log & track
Open Acetyl-L-Carnitine (ALCAR) straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
Open Acetyl-L-Carnitine (ALCAR) in the app →Go deeper
The guide & community
The complete Acetyl-L-Carnitine (ALCAR) walkthrough, real protocol discussion and coaching live inside the BlessUp community on Skool.
Join the community ↗