Carnitine

Some interesting facts about carnitine:

Carnitine is not actually an amino acid
Carnitine is not actually an amino acid, but because its structure is very similar to amino acids, it is classed here with the rest of the amino acids. It is also sometimes known as vitamin T.
Carnitine can be synthesised from lysine
Carnitine is not necessary in the diet, as the body can create it from the essential amino acid lysine. As long as there is enough foods rich in lysine in the diet, carnitine levels should be adequate.
Carnitine is used to supply energy to the cells
Carnitine has an important role in transporting fatty acids into all the cell, but especially the muscles, where they can be used for energy. Carnitine levels in the muscles are increased by physical activity, so bodybuilders and athletes use it to gain stamina and endurance in their performance.

Carnitine is not actually an amino acid, but its structure is very similar to amino acids

A popular supplemental form of carnitine is L-carnitine
Carnitine is available in many forms, but the most popular and active form of carnitine is L-carnitine.
Men need more carnitine in their diet
Men need more carnitine in their diet, due to their heavier body mass, as compared to women.
Carnitine is synthesised by a variety of other nutrients
Carnitine can be created in the body, as long as there is sufficient intake of the following essential nutrients: iron, vitamin B1 (thiamine), vitamin B6 (pyridoxine), lysine and methionine