Fat absorption and metabolism pathway

The **fat absorption and metabolism pathway** refers to the complex physiological processes by which dietary and endogenous fats (primarily triglycerides and fatty acids) are digested, absorbed, transported, stored, and used for energy in the human body. Ingested fats are first emulsified by bile salts in the small intestine, allowing pancreatic lipase to hydrolyze triglycerides into monoglycerides and free fatty acids. These are packaged into micelles, absorbed by enterocytes, re-esterified to triglycerides, and then incorporated into chylomicrons for transport via the lymphatics into systemic circulation. Peripheral tissues extract and utilize fatty acids for energy or storage via enzymes such as lipoprotein lipase. Stored fats can be mobilized during fasting states by hormone-sensitive lipase and oxidized via the beta-oxidation pathway, yielding acetyl-CoA for ATP production or ketone body synthesis. Fat absorption and metabolism are regulated by numerous enzymes and transporters but are not themselves a single drug target, rather a **biological pathway** comprising multiple molecular targets[1][2][3][4][5]. This pathway plays central roles in energy balance, cell membrane synthesis, hormonal production, and is implicated in several disorders, including obesity, cardiovascular diseases, metabolic syndrome, and malabsorption syndromes. Drugs affecting this pathway typically target specific enzymes, transporters, or steps within the broader process, rather than the pathway as a whole[1][3][5]. Because "fat absorption/metabolism pathway" is not a discrete molecule, receptor, or single protein but a complex biological process involving many molecular entities, it is **not considered a therapeutic target** itself. Therefore, it is both an imprecise and overly broad entry as a 'target,' making it **incorrect** in the strict sense for drug-target database purposes.

Other names

Fat digestion and absorption pathwayLipid metabolism pathwayFatty acid metabolism pathway

Inhibition of lipid-hydrolyzing enzymes (e.g. lipase inhibition) Alteration of bile salt function to reduce fat emulsification/absorption Modulation of lipid transport or re-esterification Reduction of cholesterol/fatty acid uptake