Dietary triglycerides and other lipid substrates in the intestinal lumen (TG)

Dietary triglycerides and other lipid substrates in the intestinal lumen are the primary dietary sources of energy and essential fatty acids for the human body. These lipids must undergo a complex process of emulsification by bile salts and enzymatic hydrolysis, primarily by pancreatic lipase, to be converted into absorbable units like free fatty acids and 2-monoacylglycerols (StatPearls, 2023). While these molecules are substrates rather than biological targets such as receptors or enzymes, they are the functional focus of therapeutic strategies for managing metabolic conditions. For instance, the weight-loss medication orlistat functions by covalently bonding to the active site of lipases, preventing them from breaking down these triglycerides and thus inhibiting their absorption (FDA, 2015). Proper management of these substrates is vital, as excessive lipid uptake is a driver of obesity and cardiovascular disease, whereas insufficient absorption can lead to steatorrhea and nutritional deficiencies (NIH, 2022).

Other names

Dietary fatsIntestinal lipidsTriacylglycerolsNeutral fatsDietary triacylglycerols

Inhibition of lipase-mediated hydrolysis and intestinal absorption