Two Weird Calorie Rules: Fibre and Alcohol
Fibre is not zero calories, and alcohol gives almost as many calories as fat. Learn the two odd calorie rules most people get wrong, the easy way.
You know protein, carb, and fat give calories. But two things on your plate break the simple rules. They are dietary fibre and alcohol. Most people guess both wrong. Let's fix that, the Burnie way.
Fibre is NOT zero calories
Fibre is the tough part of plants. Your small stomach tube cannot break it. So people think it gives zero energy. That is only half the story. In your big gut, friendly bacteria ferment (break down) fibre. They make tiny fuels called short-chain fatty acids. Your body soaks these up and uses them. So fibre does give calories, just less than sugar. Labelling rules in many places use about 2 kcal per gram for fibre. Science shows the real yield sits around 1.5 to 2.5 kcal/g, because only about 70 percent of the fibre in normal food gets fermented. The rest passes out.
Calories per gram: the full picture
Here is how the four normal macros compare with the two odd ones. Notice alcohol sits near fat, not near carbs. And fibre sits below all of them, but not at zero.
Fibre has no calories, so roti and salad are 'free' foods.
mostly falsemostly false — explained simply. Fibre is lower in calories than sugar, but it is not zero. Your gut bacteria ferment about 70 percent of it into short-chain fatty acids, giving roughly 1.5 to 2.5 kcal/g. A big plate of high-fibre food still counts. It just counts less than the same weight of rice or sugar.
Alcohol calories don't count because they are not food.
falsefalse. Alcohol gives 7 kcal per gram, almost as much as fat. A 60 ml peg of 80-proof whisky (about 2 fl oz) gives roughly 128 calories, all from ethanol. Scientists call alcohol 'empty calories' because it gives energy but almost no vitamins or minerals. Those calories still count in your daily total.
Using these rules the Burnie way
Burnie does the calorie maths for you, including these two odd macros. Here is how to use them well.
The bottom line
Two rules to remember: fibre is about 2 kcal/g, not zero. Alcohol is 7 kcal/g, not a carb. Both count in Burnie's daily deficit maths. Log them honestly, and the numbers take care of themselves. Burnie is free, with no paid tier, and never reads your heart rate, sleep, blood pressure, or location.