Omega-3 polyunsaturated fatty acid (Omega-3 PUFA)

Omega‑3 polyunsaturated fatty acids are essential long-chain lipids characterized by having the first double bond at the third carbon from the methyl end. The three main types relevant to human health are alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). These molecules play critical structural roles in cell membranes—especially in neural tissue—and serve as precursors for anti-inflammatory signaling molecules called eicosanoids. Humans cannot synthesize omega‑3 PUFAs de novo and must obtain them from dietary sources such as fish oils or certain plant oils. They have been associated with cardiovascular protection, modulation of inflammation, support for cognitive function, visual development, and other health benefits. However, they do not represent a single therapeutic "target" such as an enzyme or receptor but rather an essential nutrient class that influences multiple physiological processes through incorporation into cellular structures and modulation of biochemical pathways.

Other names

Omega-3 fatty acidn-3 polyunsaturated fatty acidN-3 PUFAPolyunsaturated omega-3 fatty acidALA (alpha-linolenic acid), EPA (eicosapentaenoic acid), DHA (docosahexaenoic acid) [these are specific members of the class]

Not applicable as a drug target. However, their biological actions include: Modulation of membrane fluidity and function; Inhibition of inflammatory eicosanoid synthesis by competing with arachidonic acid metabolism pathways; Regulation of gene expression related to inflammation via NFκB inhibition