Is Coke Diet Coke Soft Drink healthy?

Coke Diet Coke Soft Drink scores 25/100, Grade D, on HealthierCart. Category: beverages and beverages preparations. Flagged: Aspartame.

Ingredients: CARBONATED WATER, CARAMEL COLOR, ASPARTAME acts PHOSPHORIC ACID, POTASSIUM BENZOATE (TO PROTECT TASTE), NATURAL FLAVORS, CITRIC ACID, CAFFEINE