The protein craze that turbocharged energy bars and meat sticks is now coming for sugar-frosted Pop-Tarts. Starting in early November, pop-tart maker Kellanova will offer a version of the sprinkle-strewn toaster pastries with the kind of higher protein content reserved for what are typically considered healthier foods. This follows PepsiCo Inc.’s plans for a higher-protein version of Doritos. Elsewhere, protein is being added to popcorn, pasta, bread, cookie dough, ice cream and macaroni and cheese. Walmart Inc. is teaming up with OpenAI to enable shoppers to browse and purchase its products on ChatGPT, the retailer’s latest push to incorporate artificial intelligence. Bloomberg's Jen Bartashus reports.