Close this search box.

The Science of L-Carnitine: “How It Works in the Body.”



What is L-Carnitine?

L carnitine (levocarnitine) is a natural human body component that transports Mitochondria fat cells to produce energy. It is also used as a weight loss supplement.

Science of Carnitine:

Carnitine is derived from amino acids found in almost all human cells, produced and synthesized, and biosynthesized in the liver and kidneys by essential amino acids lysine and methionine.

Almost every cell in the Human body contains mitochondria, known as the Power House of a cell.

It burns fatty acids stored in long chains into energy and is then used by the cell to perform all the necessary functions.

Carnitine plays a vital role in this process of energy by transporting these fatty acids (fat cells) to the Cell’s Mitochondria so that the Mitochondria burn these cells to produce energy.

What are the types of L-Carnitine?

Carnitine has four main types:

  • D-carnitine
  • Acetyl-L-carnitine
  • L-carnitine L-tartrate
  • propionyl-L-carnitine

What are the possible benefits of L-Carnitine?

L carnitine plays an important role in cardiovascular health and is used to lose weight.

Weight Loss and Athletic Performance:

Many companies advertise this as weight loss, a supplement that improves performance as its primary natural function is to help burn fat into energy.

However, clinical trials and studies have not consistently supported this claim.

Mental Health:

Studies show acetyl-L-carnitine aids in normal brain function.

Aging-related brain conditions such as cellular damage and Alzheimer’s are greatly improved with acetyl-L-carnitine and other medications.

Patients with Alzheimer’s disease and other brain problems can add acetyl-L-carnitine to their medication by consulting their doctor for its benefit.

Carnitine also helps to improve memory function in old age.

Old Age:

As aging progresses, our cells become weaker and weaker, and their function in Mitochondria also diminishes, leading to cell failure and fatigue.

Animal studies show support that high doses of acetyl-L-carnitine reduce cell rot and improve overall cell function.

Other Cases:

L carnitine is also helpful in chronic diseases such as Cancer, Kidney Failure, and AIDS.

What are the potential side effects of L-Carnitine?

The side effects of L carnitine compared to its benefits are very mild. High doses of L carnitine supplement may cause vomiting, nausea, and stomach cramps.

However, people who eat much Meat should be careful as the primary source of L-Carnitine is Meat.

High levels of L-Carnitine in the body can lead to increased TMAO levels in the blood, which later leads to Atherosclerosis (Clogged Arteries). ).

L-carnitine may interact with certain medications and supplements, such as blood thinners and thyroid hormone replacement therapy.

Therefore, individuals taking these medications should consult a healthcare professional before taking L-carnitine supplements.

Pregnant and breastfeeding women should also avoid L-carnitine supplements until more research is conducted to determine their safety during these periods.

Possible Natural Sources of L-Carnitine:

Without Supplements, You Can Find L-carnitine in Natural Foods and, For example:
Meat, Fish, Poultry, Milk

Among the four sources above, Meat is the primary source of L-Carnitine (approximately 81mg per 85gm), followed by Fish (5 mg per 85 grams) and Chicken (3 mg per 85 grams).

It is better to get L-Carnitine from natural sources as one study shows the absorption rate of L-Carnitine taken from natural foods is much higher than that from supplements.

What are the effects and symptoms of L-carnitine deficiencies?

L-carnitine deficiency is rare as the body reproduces. Although children with a particular condition may have two types of Deficiency

1: Primary Carnitine Deficiency
2: Second Carnitine deficiency

It is primarily associated with Genetic Disorder in which carnitine’s ability to transport fatty acids to cells is impaired, leading to cardiomyopathy, hypoglycemia, and weakened bone marrow.

The second is associated with chronic kidney failure, in which the kidneys do not absorb carnitine and release high levels outside the body leading to a decrease in L Carnitine.

What is the recommended dosage of L-Carnitine?

With Athletic exercise, 3g to 5g a day is healthy for a good workout.

For daily use, 2g a day is regular and adequate.

Note: The dose is more than recommended, which can lead to many problems. We recommend discussing this with your doctor before adding L-carnitine to your diet.


L-carnitine is one of the amino acids that helps the body produce energy and burn fat. It has several potential health benefits, including improved heart health and exercise performance. While L-carnitine is found in many foods, some take supplements for added benefits. However, excessive intake of L-carnitine supplements can cause adverse effects. Therefore, it is essential to consult a healthcare professional before taking L-carnitine supplements and to use them responsibly as part of a healthy lifestyle.

Note: We do not give any medical advice.



Notice: ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/themedician/public_html/wp-includes/functions.php on line 5373