Depending on how much and how many products of their's you consume, and depending on how strict you count your consumed calories, you need to know that they are not truly 0 calories.
http://www.mouseprint.org/2011/01/17...zero-calories/
Definitely very very very low calorie. Just wanted to be sure you knew there were some calories as you said you consume a lot of their products.
at 4 calories, only 25 servings to get you to 100 calories.