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Coffee gets cleared as a cause of cancer, why dieting's often a disaster, how whole grains can extend your life -- plus more of this week's top food stories and the weekly quiz.

1) Think you know how to pick the fastest checkout line at the grocery store? There's a science to it. Here's what new research reveals about which lines are likely to move quicker.

2)

Once considered a carcinogen, coffee has been cleared of these charges. But very hot coffee (and other drinks)? That could be a problem. Bottom line: Let your coffee and tea cool slightly before you drink it.

3)

In fact, coffee may actually help protect against liver and uterine cancers, according to the World Health Organization.

4)

Discover Magazine

looks at the chemical reactions that make the food we love taste so good.

5)

Diets are a disaster for many people. Neuroscientist Sandra Aamodt examines why in her new book Why Diets Make Us Fat. She talked with NPR about why traditional diets not only don't work for many people but sometimes leave the dieter in worse shape than before.

6)

Is sugar always bad for your health? The New York Times asked scientists who study sugar about the health effects of sugar, including the difference between added and natural sugars.

7)

Most of the salt we eat is already in our food when it comes to the table -- more than 70 percent. It was added by manufacturers. The New York Times shows us where the hidden salt is -- and how to avoid it.

8)

A new report suggests that a high-fat Mediterranean diet will help you lose weight better than a low-fat diet. Olive oil and nuts are keys.


Related:


9) You've heard it before: Eat more whole grains. Now, according to a new meta-analysis, eating more whole grains is linked to a reduced risk of death from cancer, heart disease, and infectious disease. Current dietary guidelines recommend 3 daily servings or more of whole grains.


Related:

See our collection of Whole Grain Recipes.


10) Ever wonder what would happen if you went without water? TED-ED takes a fun look at the role water plays in our bodies -- and explains how much we actually need to drink to be healthy.

11)

Take the weekly health quiz from The New York Times.

Miss last week's list? We gotcha.