Splenda actually has carbs ( cals )so be careful if you are trying to limit the amount you take in.
Although the "nutritional facts" label on Splenda's retail packaging states that a single serving of 1 gram contains zero calories, each individual, tear-open package or 1 gram serving contains 3.31 calories. Such labeling is permitted in the U.S. because the FDA's regulations allow a product to be labeled as "zero calories" if the "food contains less than 5 calories per reference amount customarily consumed and per labeled serving.
As you can see it will add up if you go crazy with it.

