Have you ever been drinking a diet soda or diet coke and notice that it says the beverage contains 0 calories? Have you ever though  how can something have no calories? In spite of sweetness. Let me break down the math behind these foods and drinks.

There are two possible reasons for this:
Reason #1:

Anything made up of sugars, fats, or amino acids Unless they are break down in our body, we don’t get any calories from it.

Artificial sweeteners do contain calories but our bodies can’t break down that  compound and turn into energy but they are still recognized by the sweetness receptors on your tongue. As a result we can feel the taste of that particular beverage. Since your body can’t break them down and use them like a regular sugar, they just gets flushed from your body unchanged. This is why they have a sweet taste without the added calories.

Reason #2:

There are several different types of artificial sweeteners. But generally they are much sweeter than regular sugar, as a result they required very less quantity to make a drink that has the equivalent sweetness.  

For example, Diet Coke is sweetened with aspartame. Aspartame is a protein which tastes 200 times sweeter than table sugar. Aspartame has 4 cal per gram, just the same as regular sugar. But because it’s much sweeter than regular sugar, you require much less aspartame (1/200th) to make a drink that has the equivalent sweetness. This means from a  single can of diet coke you’re getting .36 calories. According to FDA laws anything  less than 5 calories can be labeled as “zero calorie”

Another artificial sweetener is Splenda. It also tastes much sweeter than sugar, so you need to use less of it. But also, Splenda cannot be digested by the body so it effectively has 0 calories.

So these are  the two possible reasons for diet soda or diet coke contains 0 calories?