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Tier-BPublic-ready6/13/2026

L-Carnitine

Exercise performance and recovery is the main area connected here, and any felt benefit should be read together with the human evidence base.

Representative tier calculated from paper evidence that passed the collection audit.

Papers analyzed
20
Caution signal
Low
Representative score
67.4
Exercise performance and recoveryNutrient status markersCholesterol and triglycerides

Main benefit evidence

The representative ingredient tier is calculated from these target-level evidence groups.

Exercise performance and recovery
4 studiesTier-B
Exercise performance and recovery
Fairly consistent positive signal in studiesFelt benefit focusSupplement context
Potential benefit studied in Exercise performance and recovery.
Open metrics
>
Exercise performance and recovery
No direct rate reported. Read direction and evidence strength together.
Evidence score
66.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Nutrient status
4 studiesTier-B
Nutrient status markers
Fairly consistent positive signal in studiesResearch marker focusPatient-group study
This card is closer to a measured biomarker or lab outcome than a directly felt user benefit.
Closer to a research marker than a directly felt benefit.
Open metrics
>
Nutrient status and deficiency markers
No direct rate reported. Read direction and evidence strength together.
Evidence score
54.6
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Blood lipids
4 studiesTier-B
Cholesterol and triglycerides
Fairly consistent positive signal in studiesFelt benefit focusPatient-group study
Potential benefit studied in Blood lipids.
Open metrics
>
Cholesterol and triglycerides
No direct rate reported. Read direction and evidence strength together.
Evidence score
54.6
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Immune and respiratory health
1 studiesTier-C
Immune and respiratory support
Some positive signal observedFelt benefit focusPatient-group study
Potential benefit studied in Immune and respiratory health.
Open metrics
>
Immune and respiratory support
No direct rate reported. Read direction and evidence strength together.
Evidence score
44.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Stress and mood
1 studiesTier-C
Stress Response and Sleep Changes
Some positive signal observedFelt benefit focusPatient-group study
These findings come from stress response, cortisol, anxiety, or sleep outcomes. They may mix felt benefits with physiological markers.
Open metrics
>
Stress and mood balance
No direct rate reported. Read direction and evidence strength together.
Evidence score
44.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Men's health
1 studiesTier-C
Male Reproductive Health Markers
Some positive signal observedResearch marker focusSupplement context
These findings come from sperm, semen, or hormone markers such as testosterone, LH, FSH, and inhibin B. They are closer to research measurements than a directly felt benefit.
Closer to a research marker than a directly felt benefit.
Open metrics
>
Male reproductive and hormone markers
No direct rate reported. Read direction and evidence strength together.
Evidence score
40.5
Score reflects signal strength. Tier also considers paper count, repetition, and study context.

Recent research

Updated This Month10 new papers

10 new papers were added in this period. No new risk signal was identified.

What's new

10 new papers were added.No new risk signal was identified.

Most notable recent finding

This is the most meaningful new study in the latest update.
review
Why it mattersIt ranked highest among the newly collected papers for this ingredient in the latest update.
View paper

Study dosage range (reference only)

Lower dose
2
g/day
Higher dose
2
g/day
Dosages used in research papers, shown as reference context.
Not personal dosing instructions, recommendations, or safety limits.

Key cautions to review

Standalone side-effect signals and combination cautions are listed separately.

Caution index
0.3
Caution band: Low
Caution signals
0
Side effects + combos + curated rules
Key precautions
No combination caution signal is clear enough to show right now. This does not guarantee safety.
1 combo signals and 0 added-signal combos shown below.
Standalone side effects, combination cautions, and positive combos are separated below.

Combinations studied together

The group showed a positive signal, but individual contributions are hard to isolate. Not a stack recommendation.

+Coenzyme Q10Combined supplementation with Coenzyme Q10 and L-carnitine showed significant improvements in migraine symptoms and serum lactate levels compared to placebo.

Evidence summaries

Paper IDs and full lists are private. Only study types and summaries are shown.

Key Evidence #1
Public scholarly dataCitation signal: 64
review

L-carnitine supplementation provides a modest reducing effect on body weight, BMI and fat mass, especially among adults with overweight/obesity, and suggests that ingestion of 2000 mg l-c Carnitine per day provides the maximum effect in adults.

Key Evidence #2
Public scholarly dataCitation signal: 129
review

It is demonstrated that l-carnitine alleviates muscle injury and reduces markers of cellular damage and free radical formation accompanied by attenuation of muscle soreness, thereby reducing hypoxia-induced cellular and biochemical disruptions.

Key Evidence #3
Public scholarly dataCitation signal: 124
observational

LC supplementation at a dose of 1000 mg/d was associated with a significant reduction in oxidative stress and an increase in antioxidant enzymes activities in CAD patients, which might benefit from using LC supplements to increase their anti-oxidation capacity

3 more summariesLimited representative sample by study type.
>
Public scholarly dataCitation signal: 89
review

Prolonged LC supplementation in specific conditions may affect physical performance and LC supplementation elevates fasting plasma TMAO, compound supposed to be pro-atherogenic, which was not associated with modification of determined inflammatory nor oxidativ

Public scholarly dataCitation signal: 66
observational

This double-blind parallel study provides evidences supporting the beneficial effects of Coenzyme Q10 and L-carnitine supplements on serum levels of lactate and migraine symptoms.

Public scholarly dataCitation signal: 53
observational

[Abstract]: The wide use of high-fat diet (HFD) causes negative effects on flesh quality in farmed fish. l-carnitine, a lipid-lowering additive, enhances mitochondrial fatty acid β-oxidation. However its roles in alleviating the effects of HFD on flesh quality

L-Carnitine
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