Diabetes due to pregnancy is a worry in some cases, which can be prevented. The element L-carnitine may reduce diabetes during pregnancy and daily supplement of this may help reducing this kind of gestional diabetes, which may lead to diabetes-2 in later years. A deficiency of L-carnitine already may occur in the 12th week of pregnancy. L-carnitine is a normal substance in the blood and it is essential for turning fat into energy. The reasons why the level of this vitamin-like substance descreases during pregnancy is unknown.