When you are hungry, there is one perfect snack that you should be reaching for to live a longer, healthier life.

When I am hungry, I always reach for the wrong snack. The problem is I allow myself to get to that point and then it's too late to make good choices. The key is to not allow yourself to get to the 'I could eat anything because I am so hungry' stage.

But, if you find yourself craving something, there is one snack that is perfect to eat that will help you fight obesity and live longer.

Grab a handful of nuts. It doesn't matter if it's peanuts or pistachios. People who snack on any kind of nut are 20 percent less likely to die from any cause, according to researchers from the Harvard School of Public Health. And that's not all!

People who eat nuts regularly are also thinner than those who don't eat them, a finding that should alleviate the widespread worry that eating a lot of nuts will lead to weight gain. Overall, those who eat nuts daily have a 20 percent reduction in death from all causes. Specifically, there is a reduction of 29 percent in deaths from heart disease and an 11 percent reduction in deaths from cancer.

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