What soda is healthiest out of diet coke diet 7 up sprite and Pepsi?

Among Diet Coke, Diet 7 Up, Sprite Zero, and Diet Pepsi, Diet 7 Up is often considered the healthiest option because it contains fewer artificial ingredients and is caffeine-free. All these options are low in calories and sugar, but Diet Coke and Diet Pepsi contain artificial sweeteners that some people prefer to avoid. Ultimately, the "healthiest" choice may depend on individual dietary preferences and sensitivities.