Role

Essential fatty acids are components of cell membranes.
The membranes perform a variety of functions essential for life; they keep the cellular contents intacts, maintain each cell's shape and flexibility and control the passage of compounds in and out of each cell.
They regulate the cholesterol metabolism and the blood clotting.
They transport and help the absorption of fat-soluble vitamins (A, D, E and K).
They are involved in the manufacture of prostaglandins. These substances play a role in a number of body functions including reproduction, hormone synthesis, immune function, inflammation, heart and lung functions...
They are used for energy: each gram of fat is delivering 9 calories (as compared to protein and carbohydrate which only provide 4 calories per gram).
They circulate constantly in the blood but a part of them is stored in adipose tissue.
The role of this reserve is important as it protects the body from the cold, cushions vital organs and is a source of energy ready to use.
Essential fatty acids are found in high concentrations in the brain and are essential for normal nerve impulse transmission and brain function.
DHA, which is produced from omega-3 fatty acid, is essential for normal development of eye function and vision in the growing fetus.
It can also prevent premature birth.
They have been shown to have benefical effects in the treatment of psoriasis and other skin disorders.
Omega 6 fatty acid may improve calcium absorption and reduce calcium excretion. It is benefical in treating and reducing the risk of osteoporosis.