CHICAGO (Bloomberg) — McDonald’s Corp. will next month begin selling an egg- white breakfast sandwich at all U.S. locations to help boost sales.

The chain will roll out the new 250-calorie Egg McMuffin on April 22, Ofelia Casillas, a spokeswoman for the Oak Brook, Ill.-based company, said in an email. An egg sandwich with yolk has 300 calories. McDonald’s is making efforts to promote healthier food at its stores as U.S. consumers demand more nutritious fare. Last year, the chain began advertising a “Favorites Under 400 Calories” menu.

The Big Mac seller is also facing more competition from Burger King Worldwide Inc. and Yum Brands Inc.’s Taco Bell chain. Sales at U.S. McDonald’s stores open at least 13 months fell 3.3 percent last month, the company said on March 8.

McDonald’s has been trying to attract Americans with new menu items, such as Fish McBites and chicken wings. Later this month the company will introduce new wraps including sweet chili chicken and chicken and bacon. The fast-food chain will also begin selling a blueberry pomegranate-flavored smoothie on May 15, Casillas said.