Amino Acid Amino Acids Oral

L-Carnitine

Supports fatty acid metabolism.

Sci.L-Carnitine L-Tartrate Carnitine Levocarnitine Vitamin Bt L-Carnitine L-Tartrate
2 forms
Oral

About L-Carnitine

L-Carnitine is a conditionally essential amino acid that plays a crucial role in the metabolism of fatty acids, facilitating their transport into the mitochondria for energy production. It is synthesized in the body from the amino acids lysine and methionine and is particularly important for energy metabolism in muscle tissues.

Official resources

Fact sheets from the NIH Office of Dietary Supplements related to this ingredient group.

Dietary Supplement Label Database

Ingredient group data in NutriNav is aligned with the NIH Dietary Supplement Label Database (DSLD).

DSLD group id
255

At a glance

Approval status

supplement

Compare All Forms

2 forms

Compare supplement forms of L-Carnitine by absorption quality and what your body actually gets from each:

High Moderate Low
Form Absorption Steps to absorb Notes Action
L-Carnitine
  • CAS: 541-15-1
 — — — View →
L-Carnitine L-Tartrate
  • CAS: 36687-82-8
  • Label category: synthetic
 — — — View →

Type: Amino Acids

Building blocks of proteins. Essential amino acids must be obtained from diet, while non-essential can be synthesized by the body.

Absorption: Amino acids are generally well-absorbed. Some forms (like citrulline) are more effective than others (like arginine).

Interactions: Generally safe but high doses can cause digestive issues. Some amino acids can affect neurotransmitter levels.

Watch out for

Possible interactions or cautions — talk to a healthcare provider if unsure.

  • May interact with anticoagulant medications and thyroid medications.

Potential Benefits

Benefits associated with L-Carnitine forms:

Recovery Androgen Receptor Density Enhanced Physical Performance Muscle Recovery Exercise Performance Fatty Acid Metabolism

Potential Side Effects

Side effects associated with L-Carnitine forms:

Nausea How serious: Mild Gastrointestinal Distress How serious: low Fishy Body Odor How serious: low Fishy Odor How serious: low

What does the research say?

Numerous studies have investigated the effects of L-Carnitine on exercise performance, weight loss, and heart health. Clinical trials have shown that L-Carnitine supplementation may improve exercise performance and recovery, particularly in individuals with certain health conditions. Additionally, it has been studied for its potential benefits in reducing muscle soreness and enhancing recovery post-exercise.