Biological process

down regulation of lipid biosynthetic process, down-regulation of lipid biosynthetic process, downregulation of lipid biosynthetic process, negative regulation of lipid anabolism, negative regulation of lipid biosynthesis, negative regulation of lipid formation, negative regulation of lipid synthesis, negative regulation of lipogenesis

Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of lipids.