People don't usually think so much of nuts as a protective part of the diet, but in fact they have some of the healthy fat as well.

通常人们并不认为坚果有预防疾病的功能,但事实上它们含有很多有益脂肪

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

These kinds of fats are not necessarily bad, and so things like olive oil in the diet tends to be protective and may explain some regional variations in rates of heart disease.

这些脂肪就不一定有害,所以饮食中橄榄油之类的对身体是有益的,这也解释了地域间心脏病发病率的差异

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So you could have--be consuming fat that is in itself good for heart health let's say, or maybe protective against cancer in some ways, but it's also adding calories to the diet, so you want to have the optimal amount of fat and not over-consume it because of the calories.

所以你可能是在食用,有益于你心脏健康的脂肪,打个比方,又或是在某种程度上可以抗癌,但它也给你的饮食增加了热量,因此为了减少热量应该食用适量,而非过量的脂肪

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

There is already evidence that adequate selenium in the diet may be protective against cancer, and perhaps have an impact on male fertility.

BBC: Poor diet 'boosts virus power'

The new study, published online Monday by the Journal of the American College of Cardiology, is consistent with other findings of the protective benefit of the Mediterranean diet.

WSJ: Study Finds More Benefits From the Mediterranean Diet

Researchers don't know why a plant-based diet seems to have a protective effect, but one likely reason is the nutrient profile of vegetarian diets, which tend to be higher in fiber and lower in saturated fat.

WSJ: Vegetarians Live Longer Than Meat-Eaters, Study Finds