PepsiCo expressed confidence Thursday that new products — including protein-infused Starbucks coffee, low-sugar Gatorade and Doritos with all-natural ingredients — will boost flagging consumer demand in the coming year.

Rapidly changing consumer preferences have dogged the maker of Frito-Lay snacks and Pepsi beverages. PepsiCo said Thursday that its food business revenue fell 3% in North America in the third quarter.

But PepsiCo Chairman and CEO Ramon Laguarta said Thursday that the company is moving quickly to cut underperforming products and reinvest in new ones, including a “NKD” line of Doritos and Cheetos with no artificial flavors or colors. Tostitos and Lay's chips with no artificial dyes will soon be on sale in the U.S.

“Innovation is critical for us, and we’ve been working with

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