Diet Lemonade Key Highlights – Diet Lemonade Diet lemonade is a refreshing, low-calorie beverage choice, popular for summer and restaurant menus. It features real lemon juice, water, and low-calorie or zero-calorie sweeteners such as Splenda. Compared to regular lemonade, diet lemonade contains far fewer calories and carbohydrates. Most commercial versions, like Chick-fil-A’s diet lemonade, use…