Studies revealed that fatty acid synthase (FAS) catalyzed the synthesis of saturated long-chain fatty acids from acetyl-coenzyme A, malonyl-CoA and NADPH; FAS expressed high in normal adipose, liver tissues, lactating mammary glands, and in patient tumor tissues at later stages of disease, while most normal tissues showed low levels of FAS expression [17,18,19]. Here, FAS is linked to neoplasm.