The fatty acids

The fatty acids are a group of fatty molecules that are essential to life. They are the building blocks of fats, one of the 3 main components of nutrition. Fatty acids are composed of a backbone of carbon atoms linked in chains. The chain linkages can be either single bonds or double bonds and their names reflect where in the chain the double bonds occur.
Omega-6 fatty acids are so named because they have double bonds ending at position 6 of the molecule.
Omega-3 fatty acids have double bonds ending at position 3 of the molecule.

They are also classified as either saturated (containing no double-bonded carbons) or unsaturated (containing double bonds). Unsaturated fatty acids are either mono-unsaturated (containing only 1 double-bond) or poly-unsaturated (containing multiple double bonds).You can find saturated fatty acids in meats, chicken, coconut oil.

Unsaturated fatty acids are divided in 2 classes :
Monounsaturated
You can find Monounsaturated in vegetable oils, peanuts.
Polyunsaturated

• Main Sources of omega-6 fatty acids: vegetable oils, eg. sunflower and corn oil; kidney beans, soybeans.Evening primrose oil is particularly rich in linoleic acid and eicopentaenoic acid); fish such as salmon, mackerel, tuna, herring.
• Main sources of omega-3 fatty acids : fish, such as salmon, mackerel, tuna, herring, flaxseed oil.

Linoleic and alpha-linolenic acid must be obtained from the diet as the body cannot assimilate them. They are the essential fatty acids.