Omega-6 Fatty Acids are a class of fats that contain the essential omega-6 fatty acid, linoleic acid. Because linoleic acid is not synthesized in the body, it must be consumed in the diet. Forage often contains a high enough concentration of omega-6 fats, like linoleic acid, for general health and supplementation is rarely required. Omega-6 fats are found in high concentrations in most grains and vegetable oils. The dietary ratio of omega-3 fatty acids versus omega-6 fatty acids affects the fatty acid composition of cell membranes. At the cellular level, metabolites of omega-6 fatty acids have strong pro-inflammatory effects.