N-acetyl leucine
Useful mainly for people with cerebellar ataxia or specific neurological disorders, under medical care.
Quick decision guide
May help most
people with cerebellar ataxia or specific neurological disorders, under medical care
Common dosing range
Commonly ~3–5 g/day in divided doses in studies
When to expect effects
Days to weeks
Watch out for
Use for serious neurological disease should be medically supervised
What is it
N-acetyl-leucine is an acetylated form of the amino acid leucine that crosses into the brain and acts on cerebellar and vestibular pathways. It has been studied as a treatment for inherited and acquired neurological disorders affecting balance and coordination, and the L-enantiomer (levacetylleucine) is now an approved drug for Niemann-Pick disease type C. As a supplement, robust evidence is confined to specific neurological conditions rather than general use.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
niemann-pick type c and inherited cerebellar ataxias Good Evidence | Modest improvement in ataxia scores | patients with Niemann-Pick type C or genetic cerebellar ataxias under specialist care | Days to weeks |
acute vertigo and vestibular disorders Mixed Evidence | Uncertain | people with acute vestibular vertigo | Days |
niemann-pick type c and inherited cerebellar ataxias
- Effect
- Modest improvement in ataxia scores
- Best fit
- patients with Niemann-Pick type C or genetic cerebellar ataxias under specialist care
- Time
- Days to weeks
acute vertigo and vestibular disorders
- Effect
- Uncertain
- Best fit
- people with acute vestibular vertigo
- Time
- Days
Evidence for 2 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
niemann-pick type c and inherited cerebellar ataxias
Disease adjunctRandomized and open-label trials of the L-enantiomer show improvements in standardized ataxia and functional scales in Niemann-Pick type C, leading to regulatory approval of levacetylleucine. Smaller studies suggest benefit in some inherited cerebellar ataxias. Evidence is strongest in these specific genetic conditions rather than ataxia generally.
Bottom line: Genuinely improves ataxia symptoms in Niemann-Pick C and some cerebellar ataxias under medical care.
acute vertigo and vestibular disorders
Supplement benefitAcetyl-leucine has a long history of use for acute vertigo in some countries and shows benefit in observational and small studies. Higher-quality randomized evidence is limited and mixed. Its vertigo use is plausible but less firmly established than its role in cerebellar ataxia.
Bottom line: May help acute vertigo, but controlled evidence is limited and inconsistent.
Evidence is mixed
Traditional clinical use and small studies are positive, but rigorous randomized vertigo trials are scarce.
How to take it
What to track
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Who should avoid it
- Pregnant or breastfeeding people
- People self-managing serious neurological disease without a clinician
Pregnancy & breastfeeding
Avoid unless prescribed; pregnancy safety is not established.
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
References by claim
Track N-acetyl leucine with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.