By Susan Allport
Research from the world's top universities shows that these fats do much more than regulate our brains: They can also lower risk of heart disease, arthritis, and cancer. They even help fight wrinkles and may block fat-cell formation.
While researching a book on omega-3s, I realized that the essential fats — the omega-3s and their close cousins, the omega-6s — change with the seasons. It might sound like a small idea, but it may soon fundamentally change the way you think about food.
First, let's start with omega-3s, what I'll call the spring fats. These are likely the most abundant fats in the world, but they don't originate in fish, as many believe. Rather, they are found in the green leaves of plants. Fish are full of omega-3s because they eat phytoplankton (the microscopic green plants of the ocean) and seaweed. In plants, these special fatty acids help turn sunlight into sugars, the basis of life on Earth. The spring fats speed up metabolism. They are fats that animals (humans included) use to get ready for times of activity, like the mating season. They're found in the highest concentrations in all the most active tissues: brains, eyes, hearts, the tails of sperm — the flight muscles of hummingbirds. Because fish have so many of these fats in their diets, they can be active in cold, dark waters. These fats protect our brains from neurological disorders and enable our hearts to beat billions of times without incident. But they are vanishing from our diet, and you'll soon understand why.
Next up are the omega-6s, what I'll call the fall fats. They originate in plants as well, but in the seeds of plants rather than the leaves. The fall fats are simply storage fats for plants. Animals require both — omega-3s and omega-6s — in their diets and their tissues. But omega-6s are slower and stiffer than omega-3s. Plus, they promote blood clotting and inflammation, the underlying causes of many diseases, including heart disease and arthritis. Omega-3s, on the other hand, promote blood flow and very little inflammation, which may prevent things like heart disease. The proper mix of these two fats helps create tissue with the right amount of blood flow and inflammation. But because they're in constant competition to enter our cells, if your diet consists of too many omega-6s, your body will be deficient in omega-3s. And that is what's been happening to us as we've been eating more and more seed fats in the form of soybean, corn, and other vegetable oils.
Much more at the link. It's a long - and I think - really interesting article.
http://www.msnbc.msn.com/id/32957460/ns/health-heart_health/page/2/