To turn on fat burning, many leading low carb diet plans allow no more than 20 to 30 grams of carbs per day! Even if you're at goal weight you still need to stay within "carb tolerance levels." For example, if I eat more than 50 grams of carbs per day I start layering on fat!
So knowing how to read nutrition fact labels correctly is important! Here's how: take the total carbohydrate count and subtract fiber or glycerine. That is what we call the effective carbohydrate count. The point is you don't have to count fiber and certain other ingredients (such as glycerine) because they don't act metabolically like carbohydrates and therefore have negligible effects on blood sugar which means they don't interfere with fat burning metabolism!