L-Carnitine (vitamin BT) plays a vital role in the transportation of long-c
hain fatty acids into mitochondrial matrix in mammals. L-Carnitine has a wi
de range of applications in pharmaceuticals, food products, and feed additi
ves. Due to the increasing demand for L-carnitine in food and pharmaceutica
l applications, production of this compound has become prominent. However,
very little has been reported on the production of L-carnitine. This review
discusses the microbial and the enzymatic production of L-carnitine from d
ifferent starting materials (substrates).