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Usually, we hear about how foods can help to prevent certain conditions and health problems, not about how they actually reverse them, but there is new evidence to support the claim that walnuts just might be able to do that. A study has demonstrated that some of the chemicals that naturally occur in walnuts can help to undo "some of the detrimental effects of a high-saturated-fat diet." The most important chemical seems to be arginine, which aids the body in producing nitric oxide, which in turn prevents the arteries from hardening as a result of the inflammation caused by a high saturated fat diet.

So, does this mean that you can eat all the supersized fast food meals, cheese and butter that you want to, as long as you chase them down with a handful of walnuts? Not yet, since scientists do not know how strong the protective effect of the nuts is. They recommend incorporating a few as a part of a low saturated-fat diet.

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