Protein has gone mainstream over the past decade, going from something only fitness buffs worried about to being added to countless grocery store items, from tortilla chips to cookies. But exactly how much should we be consuming every day? Do the sources matter? What does protein actually do for your body? Here’s what you need to know.

Also, what do your toenail clippings have to do with cancer research? University of Calgary is conducting a study that researchers expect to confirm that toenails hold crucial data that can be used as part of an equation to estimate the risk of lung cancer. Read more.

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