Omega 3 and Omega 6 are called essential (essential) fatty acids. They are so called because the body can not produce them, they must be supplied through the diet.
Omega 3 found mainly in fish, shellfish and aquatic mammals, but also in meat from grass-fed herbivores. Even some plants are Omega 3 fats, but we humans can only convert one percent of these to the long-chain type of Omega 3 found in animal foods, and that is what we need. Herbivores both on land and in the oceans can make this transformation, and we can get in our fats by eating herbivores. Vegetarians and vegans often develop a deficiency of these fatty acids.
Domestic animals that are reared mainly concentrates (grain) has a low content of Omega 3 and high content of Omega 6. Also, farmed fish have a lower proportion of omega-3 than the wild unless Omega 3 is added to the fish feed. …show more content…
Another source whose scope is increasing, the various vegetable oils and margarines also because margarine is made from vegetable oils.
Omega 3 is very important for brain development. In ancient times it was said that one becomes intelligent of fish and it is actually true. All mammals with large brains have evolved in a marine environment with good access to long-chain Omega 3 fatty acids. One would actually small exaggeration to say that the fishermen made us human!
The brain consists of 60% of fat. Approximately 20% are Omega 3 and Omega 6 in equal parts
The balance between Omega 3 and Omega 6 are extremely important. It is estimated that during the Stone Age to the stage ungeför equal amounts of each. In the early 1900s we ate four times as much Omega 6 to Omega 3 and today it is estimated that we eat 20 and for some individuals up to 40 times as much Omega 6 to Omega 3!
Why is this so