has primary output fatty acid anion fatty acid metabolic process fatty acid biosynthetic process fatty acid biosynthesis fatty acid formation Wikipedia:Fatty_acid_synthesis The chemical reactions and pathways resulting in the formation of a fatty acid, any of the aliphatic monocarboxylic acids that can be liberated by hydrolysis from naturally occurring fats and oils. Fatty acids are predominantly straight-chain acids of 4 to 24 carbon atoms, which may be saturated or unsaturated; branched fatty acids and hydroxy fatty acids also occur, and very long chain acids of over 30 carbons are found in waxes. fatty acid anabolism fatty acid synthesis GO:0006633 MetaCyc:PWY-4381 biological_process MetaCyc:FASYN-INITIAL-PWY GO:0000037 MetaCyc:PWY-5156 lipid biosynthetic process biosynthetic process monocarboxylic acid biosynthetic process