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L-Carnitine in Neuralisse: How Much, Which Form, and What Studies Used
L-carnitine is fourth in the 575 mg Neuralisse blend, so a capsule holds at most 143 mg. The label prints no amount. Nerve studies used a different form, acetyl-L-carnitine, at 500 to 2,000 mg a day. The NIH says healthy adults make all the carnitine they need, and general trials used 1 to 2 grams a day.
Written by the Neuralisse editorial teamUpdated
The basics
What is L-carnitine?
L-carnitine is a nutrient made from amino acids. It carries fats into the parts of cells that burn them for energy.
Your liver and kidneys make it, and you also get it from meat, fish and dairy. The NIH says healthy children and adults make all the carnitine they need, so most people do not need a supplement (ODS, Carnitine). Some people with certain genetic conditions or kidney disease on dialysis may run low, and a doctor manages that.
| Label name | L-Carnitine |
|---|---|
| What it is | Amino acid derivative · Nutrient the body also makes |
| Position in the blend | 4 of 6 (labels list blend ingredients from most to least by weight) |
| Amount per capsule | Not disclosed; at most 143 mg by label math |
| Amount used in research | 1-2 g a day in trials; nerve studies used acetyl-L-carnitine at 500-2,000 mg |
| Strength of evidence | Limited (nerve research used another form) |
| Why it is used | Helps move fat into cells for energy |
| Main caution | 3 g or more a day causes stomach upset and a fishy odor; some seizure drugs lower carnitine. |
On the label
How much L-carnitine is in Neuralisse?
The label gives no amount. L-carnitine is fourth of six in the 575 mg blend, so it can weigh at most 143 mg per capsule.
Blend ingredients appear from most to least by weight (FDA, Labeling guide). The fourth one can be no more than one-quarter of the total: 575 mg divided by 4 is about 143 mg.
That figure is a ceiling. With magnesium glycinate filling much of the blend, plus alpha-lipoic acid and butcher's broom ahead of it, L-carnitine is likely well under 143 mg. The label also does not say which salt is used, such as L-carnitine tartrate.
| Label name | L-Carnitine |
|---|---|
| Form | Plain L-carnitine, not acetyl-L-carnitine |
| Position in blend | 4 of 6 |
| Printed amount | Not published |
| Most it could weigh | 143 mg per capsule |
Forms
Is L-carnitine the same as acetyl-L-carnitine?
No. The NIH names two main supplement forms: L-carnitine and acetyl-L-carnitine (ODS, Carnitine). They are related, but they are sold, dosed and studied separately.
L-carnitine
The basic form. It is the one most often studied for general energy and exercise uses, at 1 to 2 grams a day (ODS, Carnitine (HP)).
Acetyl-L-carnitine
Carnitine with an acetyl group attached. This is the form used in the nerve studies that showed a benefit (Di Stefano et al., 2019).
Results from one form should not be applied to the other. So the nerve research below does not tell us what plain L-carnitine does in Neuralisse. Our post on L-carnitine vs acetyl-L-carnitine goes deeper.
Research
What do studies say about carnitine and nerves?
A 2019 systematic review found that acetyl-L-carnitine cut nerve pain by about 20% more than a placebo in people with diabetes (Di Stefano et al., 2019). The trials used 500 to 2,000 mg a day.
The review also had clear limits. There were only four trials. They were small and short. A separate review of acetyl-L-carnitine, later corrected, still found lower pain scores, again for the acetyl form (Li et al., 2015 (correction)).
- What was tested
Acetyl-L-carnitine, mostly in people with diabetic nerve pain.
- How much
500 to 2,000 mg a day, many times the Neuralisse ceiling.
- What it found
Pain fell about 20% more than placebo, in small, short trials.
- What it means here
Little, because the label lists plain L-carnitine at a far lower amount.
Dose check
How does the Neuralisse amount compare with study doses?
At its ceiling of 143 mg, Neuralisse has about one-seventh of the 1 gram low end used in general L-carnitine trials. Against the acetyl-L-carnitine nerve trials, the gap is in both form and dose.
| Source | Form | Daily amount |
|---|---|---|
| Neuralisse, 1 capsule | L-carnitine | At most 143 mg |
| General trials, NIH | L-carnitine | 1,000 to 2,000 mg (ODS, Carnitine (HP)) |
| Nerve trials | Acetyl-L-carnitine | 500 to 2,000 mg (Di Stefano et al., 2019) |
| Side effects start, NIH | Carnitine | About 3,000 mg |
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What are the side effects of L-carnitine?
At low amounts, side effects are unlikely. The NIH says about 3 grams a day can cause nausea, vomiting, stomach cramps, diarrhea and a fishy body odor (ODS, Carnitine (HP)). Neuralisse is far below that.
The NIH also notes a research question. Gut bacteria turn carnitine into a compound called TMAO, which scientists are studying for a possible link to heart disease. The answer is not settled.
Some seizure medicines, such as valproic acid, can lower the body's carnitine levels (ODS, Carnitine (HP)). If you take one, ask your neurologist before adding any carnitine product, including Neuralisse.
Check first
Who should ask a doctor before taking L-carnitine?
Seizure medicine
Anyone on valproic acid or other seizure drugs that affect carnitine.
Kidney disease
Anyone on dialysis or with weak kidneys, whose carnitine is managed by a doctor.
Heart concerns
Anyone with heart disease who wants to ask about the TMAO question.
Our take
Does the L-carnitine in Neuralisse add much?
Probably very little. It is the wrong form for the nerve research and a small fraction of the general trial dose. It is also low-risk at this amount, which is a fair point in its favor.
Pros
- Far below the 3 gram level linked to stomach upset
- A nutrient the body already makes and uses
- Clearly named on the label
Cons
- Plain L-carnitine, not the acetyl form studied for nerves
- At most 143 mg, against 1 to 2 grams in trials
- Amount not printed
All six
What comes after L-carnitine in the Neuralisse blend?
After L-carnitine come turmeric extract and coenzyme Q10, the two lightest ingredients. Before it sits butcher's broom.
Ongoing tingling or numbness in the hands or feet is a reason to see a doctor, since treatment depends on the cause (MedlinePlus, Nerve disorders). If you try the product, our results timeline explains what to track over the 60-day window.
FAQ
L-carnitine in Neuralisse FAQ
How much L-carnitine is in Neuralisse?
Neuralisse does not print the amount. L-carnitine is fourth of six in a 575 mg blend, so it can weigh at most 143 mg per capsule. The real amount is likely lower, since three heavier ingredients come before it, including magnesium glycinate.
Does L-carnitine help nerve pain?
The nerve research mostly used acetyl-L-carnitine, not plain L-carnitine. A 2019 review found acetyl-L-carnitine at 500 to 2,000 mg a day cut pain about 20% more than placebo in small, short trials. Neuralisse lists plain L-carnitine at no more than 143 mg.
What is the difference between L-carnitine and acetyl-L-carnitine?
Acetyl-L-carnitine is L-carnitine with an acetyl group attached. The NIH lists them as the two main supplement forms. They are studied separately, and the nerve trials used the acetyl form. Results from one form should not be assumed for the other.
What are the side effects of L-carnitine?
At around 3 grams a day, the NIH says L-carnitine can cause nausea, vomiting, stomach cramps, diarrhea and a fishy body odor. Neuralisse contains at most 143 mg, so these are unlikely. Gut bacteria also turn carnitine into TMAO, which is still being studied.
Can I take L-carnitine with seizure medicine?
Ask your neurologist first. The NIH notes that some seizure medicines, such as valproic acid, can lower the body's carnitine levels. That is a reason to involve your doctor, not to self-treat. They can decide whether any carnitine product is right for you.
Do I need to take L-carnitine?
Most people do not. The NIH says healthy children and adults make all the carnitine they need in the liver and kidneys, and they also get it from meat, fish and dairy. Some people with rare genetic conditions or on dialysis may need it under a doctor's care.
How long does L-carnitine take to work?
There is no clear timeline for the small amount in Neuralisse. The acetyl-L-carnitine nerve trials were short, and they used a different form at higher doses. If you try Neuralisse, note how you feel over the 60-day guarantee window and share it with your doctor.
Who wrote this
Written and reviewed by
Plain-language pages built from the bottle label, the order page and linked public health sources such as NIH, FDA and CDC.
Last updated . Read our editorial standards and how we check reviews. This website is run by an American stocking outlet for Neuralisse, not by the manufacturer. We earn money when you buy through our order links.
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More about Neuralisse
Ingredients
All six Neuralisse ingredients in label order, with the most each can weigh and what studies used.
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L-carnitine vs acetyl-L-carnitine
Two carnitine forms, one used in nerve studies. Doses, side effects, TMAO and what the Neuralisse label lists.
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Results timeline
No trial sets a timeline. See how long ingredient studies ran and what to track for 60 days.
Read moreAuthorized American Neuralisse outlet
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