Acetyl-L-Carnitine · Acetyl Carnitine · ALC
L-Carnitine that crosses the blood-brain barrier — mitochondrial support with a cognitive edge.
FDA
Approved
WADA
Not Listed
HALF-LIFE
~4–6 hours
ROUTE
Oral
SCHEDULE
Daily, morning or pre-workout
In Plain English
L-Carnitine that crosses the blood-brain barrier — mitochondrial support with a cognitive edge.
Status & Legality
NATTY?
No Test ExistsNo established test exists for this compound.
FDA
ApprovedFDA approved for human use.
WADA
Not ListedNot currently on WADA prohibited list.
COMPOUNDING
Rx AvailableAvailable at licensed pharmacies with prescription.
PRESCRIBED
By prescriptionPhysicians can prescribe this compound legally.
ROUTE
OralAdministration via oral.
Brain energy metabolism
Neuroprotection
Cognitive function
Mitochondrial support
ALCAR is the acetylated form of L-Carnitine with superior CNS penetration. It crosses the blood-brain barrier where it supports mitochondrial function in neurons, donates acetyl groups for acetylcholine synthesis, and protects against oxidative damage. Clinically studied for age-related cognitive decline, diabetic neuropathy, and depression. More effective than regular L-Carnitine for neurological and cognitive applications.
Mild fishy odor at high doses
Restlessness or insomnia if taken late in day
Nausea at high doses
GI discomfort
Taking in the afternoon or evening — ALCAR is mildly stimulating; late dosing disrupts sleep in sensitive individuals; morning dosing is critical
Using ALCAR when L-Carnitine Tartrate better serves athletic goals — ALCAR is the neurological form; use LCLT for muscle carnitine loading and performance
Not combining with CoQ10 — ALCAR transports fatty acids into mitochondria; CoQ10 ensures those fats are efficiently converted to ATP; they work as a pair
Thyroid medications — same as L-Carnitine; ALCAR can reduce cellular uptake of thyroid hormones
AChE inhibitors (donepezil, rivastigmine) — ALCAR donates acetyl groups for acetylcholine synthesis; additive cholinergic effects require monitoring
Cholinergic medications — additive acetylcholine effects; adjust doses accordingly
ALCAR is the neurological version of L-Carnitine — same mitochondrial fatty acid transport, but working in neurons instead of muscle. The acetyl group donation for acetylcholine synthesis adds a cognitive edge beyond what regular carnitine provides. Take it in the morning and stack with CoQ10 for complete mitochondrial optimization in the CNS.
Stats
Sources & Studies
Veronese N. et al., Psychosom Med, 2018