Also known as EFAs, essential fatty acids are substances which are required for good health, but which cannot be produced by the body. There are two essential fatty acids: alpha-linolenic acid (omega-3) and linoleic acid (omega-6).However, this section may include nutrients that are not essential, but still important. By getting more of these nutrients in your diet, you may improve sleep quality, increase muscle protein synthesis (for increased growth), speed up workout recovery and enhance heart health. Essential fatty acids are also said to help the body better absorb vitamins for wider health benefits. The different products may be designed for men, women, for people involved in sports, and for those in all walks of life.