The Essential Fatty Acids (Omegas) are molecules of fat found in some oleaginous seeds and which, to be functional and bioactive, should be extracted by cold pressing.

The Omega-3 and Omega-6 acids are essential in the formation of cellular membranes, to maintain the balance of the organic functions (structural and functional roles) and to improve the metabolic processes. They influence the activity of enzymes linked to the cellular membranes, and their presence is fundamental for the action of amines upon their receptors; they stimulate the immunological processes and are precursors of the prostaglandins and leukotrienes.
The prostaglandins stimulate the brown fat cells and help in the regeneration of the mitochondrias by burning the fats more efficiently. The higher the essential fatty acid levels in the organism, the greater the capacity of the prostaglandins to activate the brown fat cells and consequently, to control dyslipidemias and some types of obesity.
Omega-6 acids are found in vegetal oils in the form of linoleic acid, which is biologically inactive and needs to be transformed into gamma-linolenic acid (GLA) under the influence of the delta-6-desaturase enzyme (a reaction catalyzed by zinc and blocked by stress, alcohol and infections). It is recommended in the treatment of allergies, arthritis, skin diseases (psoriasis and eczema) and lipid metabolism diseases. The formation of GLA can be inhibited by the administration of non-steroid anti-inflammatory agents, corticoids and beta-blockers. GLA is the most powerful and most commonly used Omega-6 acid. It is believed that an adult man requires 7.5 grams of Omega-6 acid daily.
Human maternal milk is very rich in essential fatty acids. It contains around 11% of linoleic acid (whilst cow's milk possesses about 1%), 0.4% of gamma-linolenic acid and 0.4% of arachidonic acid. Human milk is the only one to contain significant amounts of GLA which protects breast-feeding babies against infections and allergies. It also prevents metabolic disorders and obesity. The brain development of the child might be affected by insufficient quantities of essential fatty acids.
Studies undertaken in Denmark showed that inhabitants of Greenland have a low rate of arteriosclerosis, as well as low incidences of brain thrombosis and senile dementia. This, it was discovered, is related to the sea-food rich in Omega-3 that is eaten by the population, acting to inhibit the formation of thrombi by hindering platelet aggregation and also assisting in controlling the levels of cholesterol, reducing the LDL (bad cholesterol) and increasing the HDL (good cholesterol).
Other research performed with asthmatic sufferers who presented with selenic acid, zinc and Omega-3 deficiencies were treated with antioxidants associated with Omega-3 over a ten week trial period. These individuals showed a clinical improvement in 90% of the cases, with 50% of the individuals having no symptoms at all at the end of the study.

A little more about Essential Fatty Acids
Cold-pressed oils are rich in essential fatty acids (Omega-3 and Omega-6) and are therefore the most healthy and tasty way to ingest sufficient quantities of these compounds .

Examples of Essential Fatty Acids:
Omega 3
Linolenic alpha acid
Omega 6
Linolenic acid
Omega 7
Palmitoleic acid
Omega 9
Oleic acid