Fish-eating, but do not French fries

; will be a significant change in biological evolution because on a particular molecule is courage.This shift is attributed to the two really can be said that this molecule is a bit audacious.However, DHA was held in London recently to celebrate a popular meeting point is this.The Conference is not so much a happy holiday, it is more of a science conference.But one thing is certain, the General Assembly, a love of the event.General Assembly on May 26 and 27 at the Royal Pharmaceutical Society (The Royal Society of Medicine) was held, the meeting was to discuss the theme of docosahexaenoic acid (DHA) of the many advantages of a currently popular with the molecule The most important food chemicals, the ω-3 fatty acids.

DHA constitutes a component of the brain, particularly between nerve cells form synaptic junctions in the modern diet, it is oil in the ω-6 fatty acids are replaced.Ω-6 fatty acid containing oils, including soybean oil, corn oil and vegetable oil, the situation is worrying.Many researchers think this change in diet (and the corresponding changes in brain chemistry) revealed that the recent depression, bipolar disorder (manic-depression), memory loss, schizophrenia and attention deficit disorders and other mental reasons for the increase.This change in diet may also be relevant with the rise in obesity rates, so that more people are suffering from heart disease.Overweight is often associated with heart disease.

Michael? Crawford (Michael Crawford) is located in London, Brain Chemistry and Human Nutrition Institute, a research staff, his view is the role of DHA is even more important.He suggests that it led to the emergence of the nervous system, is what human ancestors of the recent access to large quantities of food containing this ingredient causes brain evolution.

fisheye

to Dr Crawford, DHA is the role of the initial in vivo in single cells to convert light into electricity.This single-cell organisms to a primitive form of vision, allowing them to move under the light and shade, it also produced a biological control of electrical potential.Single-celled organism to evolve into multicellular organisms, the condition that cells must be able to communicate with each other.Potential is the foundation of all the nervous system is a way to provide such communication.The DHA make it possible.

this molecule is certainly prevalent in cells in vivo.In the single-cell organisms evolved into multi-cellular organisms about 600 million years after the human eye photoreceptor cells in the fatty acid molecules are still more than half of DHA, which constitutes the DHA content of brain synapses will not be much lower than the percentage.But the reality is that similar molecules more readily available, are gradually replaced DHA.Dr.Crawford, DHA deficiency is a long process of evolution problems.The molecule is stored in fish fat.He suggests this might unlock some mysteries.For example, roughly the same weight of dolphin and a zebra, but why do the brain weight of 1.8 kg, while the zebra's brain weighs only 350 grams? He further concluded that the ancestors of human brain weighs about 6 million years ago dramatically increased, the reason is not the apes leave the forest to grassland foraging later, but because they came to the sea, rich in DHA to fish for food.

must point out that not everyone agrees with this interpretation of his history.For one thing, the human ancestors seem to have been not limited to the coast.However, everyone agrees with this view: instead of using surface molecules similar to DHA is not a good thing.

rejected alternatives

Joseph? Accept no (Joseph Hibbeln) is A U.S.National Institutes of Health researcher, he has been studying for the babies through breast milk DHA and by genetic variation in the ω-3 fatty acids from other molecules the ability to produce this molecule.Since the early 90s of last century, a study has shown that breastfed children about the same IQ, and whether to make their own ability to produce DHA has nothing to do.In the lower DHA, children fed on formula milk, DHA did not generate their own ability than the average IQ of children have this ability to lower the IQ of children 7.8.

lack of DHA is not just intellectual.Large amounts of data indicate that violent behavior and the lack of ω-3.Because fish are rich in DHA, fish-eating people and more countries have less prone to depression, suicide and murder are also low.Accept no Dr.recent research suggests that low levels of DHA in vivo is caused by American servicemen and women as a risk factor for suicide.Before committing suicide, suicide routine blood tests in blood samples taken in recent DHA were significantly lower than comparable workers who are still alive.More worrisome is that 95% of American troops in vivo DHA levels that these results show that the level of risk of suicide.

U.S.Department of Defense has taken note of this.It will soon unveil a plan to increase the soldier's diet ω-3 fatty acids.U.S.Food and Drug Administration may change its policy.Thomas? Branagh (Thomas Brenna) is a professor of nutrition at Cornell University, he wrote an open letter (many of the scientists attending the meeting signed), urging the agency to revise its advice to pregnant and fertile women that they limit food fish file.The proposal is enacted in 2004, aims to protect the fetus from harm methylmercury.Concentration of methylmercury in fish such as tuna.The signatories have all agreed that this effect is of eating fatty fish and are negligible compared to the benefits of DHA.

However, this view may be swimming against the tide.The popularity of cheap vegetable oil-based foods rich in ω-6, which will be difficult to reverse.In fact, if another study, Dr.Accept no proof of man and rodents, similar to the above will be able to prove his point.

In this experiment, he fed rats diets in one case an 8% calories from linoleic acid (an ω-6 fatty acids), the other was 1%, in addition to other exactly the same ingredients.The percentage of linoleic acid from 1909 to reflect the early 21st century, Americans ω-6 content of the diet changes.

fed food containing 8% linoleic acid, mice, the level of obesity has doubled.It turned out that in mice (also in humans) molecules convert linoleic acid into a endocannabinoids (endocannabinoids) molecule that trigger appetite.In other words, that is, no matter who eat ω-6, want to eat more food.For humans, because the food is rich in ω-6 than ω-3 rich food is much cheaper, so people are more likely to consume food.

not yet out of this vicious cycle is not obvious.Eating fish is all very well, but the ocean has been overtaxed.May be able to count on biotechnology, manufacturing, such as the high-DHA transgenic soybean crops.But until that day comes, you should keep in mind the received wisdom is probably that the oracle at Delphi pillars: Nothing in excess.

http://vividscience.org/2010/06/03/fish-and-no-chips.html