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Protein is popping up in everything from popcorn and tortilla chips to coffee and ice cream, and now a new form is flexing for attention.

High-protein grocery items have surged in popularity over the past year, with shoppers seeking products that support muscle repair, immune function and metabolism. Long a staple in fitness circles, protein shakes — typically made from whey concentrate and coming in flavors like chocolate, vanilla and peanut butter — offer a creamy, milkshake-like way to pack in the nutrients.

Now muscling its way into the supplement spotlight is clear protein, which is made from whey protein isolate and comes in ready-to-drink bottles or powders that turn water into brightly colored, juice-like beverages

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