Essential Fatty Acids are very important fats that the body can’t produce so it is primarily derived from the diet. Essential fatty acids sources are fish, fish oil, nuts, seeds, and whole grains. There are two kinds of essential fatty acids, the Omega-3 and the Omega-6 fatty acids and both are needed in keeping the nervous, cardiovascular, reproductive, and immune systems healthy. Other known essential fatty acids benefits include weight control and giving the hair and skin a healthy glow. Fish oil, evening primrose oil and flax seed are the most popular essential fatty acids supplements.