L-Carnitine
Description
L-Carnitine is a naturally occurring amino acid derivative that plays a vital role in the body's energy production. It is primarily responsible for transporting long-chain fatty acids into the mitochondria, where they are oxidized, or "burned," to produce energy. This process is crucial for the function of muscles, including the heart, and is particularly important during intense physical activity. While the body can synthesize L-Carnitine from the amino acids lysine and methionine, it is also obtained through the diet, especially from animal products. L-Carnitine exists in various forms, such as L-Carnitine tartrate and Acetyl-L-Carnitine (ALCAR), each with slightly different uses and bioavailability. ALCAR, for instance, is often favored for its potential to cross the blood-brain barrier, offering cognitive benefits. Supplementation with L-Carnitine is commonly used to enhance athletic performance, aid in weight management by promoting fat burning, and potentially improve cardiovascular health. It is also studied for its role in mitigating muscle damage, speeding up recovery after exercise, and supporting overall cellular energy and antioxidant defenses.
Sources
Red meat (e.g., beef)PorkFish (e.g., cod, salmon)Poultry (e.g., chicken)Dairy products (e.g., milk, cheese)
Cheapest L-Carnitine supplements
Best L-Carnitine supplements
Value L-Carnitine supplements
Optimal Dosage
Minimum500 mg
Maximum2000 mg
Safety & Toxicity
Toxicity Threshold5000 mg
Toxicity EffectNausea, diarrhea, fishy odor
Goals
Cardiovascular Support
Impact
High effect
The heart derives most of its energy from burning fatty acids. L-Carnitine is the essential shuttle that transports these fatty acids across the mitochondrial membrane. Supplementation supports efficient energy production, which is critical for the function of the constantly working cardiac muscle.
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Fitness
Impact
Moderate effect
L-Carnitine plays a role in transporting fatty acids into mitochondria to be used for energy. Evidence suggests it can reduce markers of muscle damage and decrease delayed onset muscle soreness (DOMS), allowing for more frequent and effective training.
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Heart Health
Impact
Situational effect
Typical dose:1000–2000 mg
By improving fatty acid metabolism, L-Carnitine can enhance energy production in the heart, which may be beneficial in conditions like angina or during recovery from a cardiac event. It helps the heart function more efficiently under metabolic stress.
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Interactions
Positive Interactions
Lysine
Lysine is one of the two amino acids from which L-Carnitine is synthesized in the body, potentially enhancing endogenous production.
METHIONINE
Methionine is one of the two amino acids from which L-Carnitine is synthesized in the body, potentially enhancing endogenous production.
Vitamin C
Vitamin C is a required cofactor for the enzymes involved in L-Carnitine biosynthesis.
Iron
Iron is a necessary cofactor for the enzymes involved in L-Carnitine biosynthesis.
Vitamin B6
Vitamin B6 is involved in amino acid metabolism, which supports the body's synthesis of L-Carnitine.
Choline
Choline participates in methylation processes essential for the synthesis of L-Carnitine from its precursor amino acids.
Acetyl L-Carnitine
Acetyl L-Carnitine is a form of L-Carnitine with unique properties, particularly for cognitive support, and they are often used together or interchangeably depending on specific goals.
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L-Carnitine: 1100 mg
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Product stats
Price per product
Average$34.42
Median$27.74
Price per serving
Average$0.95
Median$0.67
Price distribution
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