Source of essential fatty acids

The term "Source of essential fatty acids" refers to foods or lipids that provide essential fatty acids—specifically, linoleic acid (an omega-6 fatty acid) and alpha-linolenic acid (an omega-3 fatty acid)—which humans cannot synthesize de novo and must obtain from their diet. This is a dietary/nutritional category, not a defined molecular target or receptor. Essential fatty acids are vital nutrients humans must ingest for health; they are not specific molecules, proteins, or receptors themselves. The major essential fatty acids are linoleic acid (LA, 18:2 n-6) and alpha-linolenic acid (ALA, 18:3 n-3). While biological targets of fatty acids include enzymes such as fatty acid desaturases (e.g., FADS1, FADS2) and various receptors (e.g., PPARs), "source" does not refer to any of these directly. Common sources are plant oils (e.g., flaxseed, soybean, canola for ALA; sunflower, safflower, and corn oil for LA), nuts, seeds, and fish oils, but again, these are not molecular targets. In summary, this entry does not fit the criteria for a molecular target because it lacks specificity, is not a protein or receptor, and describes a nutritional characteristic rather than a druggable entity.