McDonald’s said on Wednesday that it would begin posting calorie counts on all its menus next week — a move that could put pressure on other fast-food restaurants to do the same. The company also unveiled several menu additions aimed at making its offerings more healthful. They include an egg white McMuffin, a grilled chicken option for the Happy Meal and seasonal fruits and vegetables like blueberries and cucumbers.

“We recognize customers want to know more about the nutrition content of the food and beverages they order,” Jan Fields, president of McDonald’s USA, said in a statement.

McDonald’s has been experimenting this summer with placards listing “Favorites Under 400,” the items on its menu that have 400 calories or fewer. This fall, some 750,000 of its employees will be able to participate in an e-learning program about nutrition, calories and the company’s menu to help them answer customers’ questions.

McDonald’s plans to introduce an app this year that will provide customers with information about calories in its products and help them build a customized meal plan.