There are two fatty acids that are absolutely essential to the body, meaning the body cannot make them on its own:
1) Linoleic Acid (LA) — Omega 6
2) Alpha-linolenic Acid (ALA) — Omega 3
There are four other fatty acids that are conditionally essential, meaning it is POSSIBLE to derive them from the other two, with the right cofactors:
1) Gamma-linolenic Acid (GLA)
2) Arachidonic Acid (AA)
3) Eicosapentaenoic Acid (EPA)
4) Docosahexaenoic Acid (DHA)
All fats and oils are some combination of saturated, monounsaturated, and polyunsaturated fatty acids.
Cooking is the primary use for cold-pressed oil. Olive, sesame, sunflower, canola and coconut oil can all be extracted using cold-pressed methods and used for flavor in marinades, salad dressings and baked goods.
Makers of aromatherapy and cosmetic products use oils from almonds, jojoba, rosehip seeds and more. Flaxseed oil and evening primrose oil are readily available online as dietary supplements. The EPA approved cold-pressed neem oil, derived from the seeds of the tropical neem tree, for use as a biopesticide in 2009. Incredibly, cold-pressed neem oil repels insects without harming plants, animals, fish, birds, people or the environment.