A SOURCE OF UNADULTERATED FATTY ACIDS IS NEEDED: It is well established that polyunsaturated fats, of which omega-3 fatty acids are a type, must be included in the diet, as humans cannot produce these themselves. However, many of the fats in the diet are hydrogenated (made into saturated fats which are solid at room temperature as opposed to liquid). The reason manufacturers hydrogenate them is to increase their usefulness in food production. As a result, trans fats are generated that are not useful to the body, and may increase cholesterol, and inhibit the metabolism of even the good fats. Therefore, a source of "unadulterated" polyunsaturated fats is essential (raw vegetable oils, nuts, and fish oils are good sources of essential fats).