It is discovered that fats found in some biscuits, cakes and processed foods could have a harmful effect on memory.
The fats, known as trans fats（反式脂肪）, are used both in processed food and in restaurants, often to improve the texture, shelf life or flavor. They are created when hydrogen is added to vegetable oil to make it more solid, which is why they are often called partially hydrogenated oils（氢化油）.
Now, a study of 1,000 healthy men aged under 45 found those who ate the most trans fat had worse scores in a word memory test. Study leader Dr Beatrice Golomb said: “Trans fats were most strongly linked to worse memory, in young and middle-aged men. From a health standpoint, trans fat consumption has been linked to higher body weight, more aggression and heart disease. While trans fats increase the shelf life of foods, they reduce the shelf life of people.”
The participants were asked to complete a dietary questionnaire, from which the researchers estimated participants’ trans fat consumption. The test found each additional gram a day of trans fats consumed was associated with an estimated 0.76 fewer words correctly recalled. For those eating the highest amounts of trans fats, this translated to an estimated 11 fewer words —a reduction of 10 per cent in words recalled compared to adults who ate the least trans fat. The average number of words correctly recalled was 86, according to research presented at the American heart Association’s Scientific sessions 2014 in Chicago.
Trans fat is widely considered the worst kind for your heart, even worse than saturated fat（饱和脂肪）, which can also contribute to heart disease. The UK food industry in recent years has reduced or eliminated industrially produced trans fat in foods.
The Food and Drug Administration is taking further steps to reduce the amount of artificial trans fats in the US food supply.
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