Coke Zero, officially marketed as Coca-Cola Zero Sugar, is a diet soda produced by The Coca-Cola Company. It was introduced in 2005 as Coca-Cola Zero and rebranded in 2017 with a modified formula, aiming to taste even more like the original Coca-Cola. 

While Coke Zero is 0 calorie and 0 Net Carb. It is also little to no nutritional value while you're trying to lose weight. On our program, you should limit the amount of coke zero, or any zero calorie soda's that you drink.

Here's a breakdown of its key characteristics:

Taste:

• Coke Zero is specifically formulated to mimic the taste of regular Coca-Cola as closely as possible, without the sugar. 
• Many people find it to have a smoother and less "diet" taste compared to Diet Coke. 
• Some describe it as having a slightly different flavor profile than Diet Coke, often attributed to the different blend of artificial sweeteners used.

Sweeteners:

• It uses a combination of artificial sweeteners, typically aspartame and acesulfame potassium, to achieve its sweetness without calories. 

Calories and Sugar:

• As the name suggests, Coke Zero contains zero sugar and zero calories. 

Caffeine:

• It contains caffeine, though slightly less than regular Coca-Cola and Diet Coke. Caffeine-free versions are also available in some markets.

Comparison to Diet Coke:

• While both are zero-sugar and zero-calorie colas, Coke Zero and Diet Coke have distinct formulas and therefore different tastes. Diet Coke has been around longer and has its own unique flavor profile, which is lighter and crisper than Coke Zero's attempt to replicate the original Coke taste.