Fat in foods does not only increase the number of calories but also give the product/food its structure. To make a product low in fat or fat-free, food manufactures have to remove the fact, affecting both taste and structure.
To compensate, they add additives and preservatives such as sweeteners like sugar, high fructose corn syrup or artificial sweeteners like aspartame. Technically, the product is low in fat but very high in sugars.
Even if artificial sweeteners have no calories, the recent evidence does not suggest that they are better for you than sugar. But that is another myth we will be discussing later.
It is very simple really, if you take a look at the nutritional labels of a low fat yogurt and a full fat yogurt, you will realize that the low fat yogurt has actually more sugar than the full fat version.
Another misconception worth highlighting here is that a lot of people believe that low fat means also low in sugar. This is not the case! For food manufacturer to be allowed to add a low-fat label on a product, the product needs to have less than 3% fat. They can add anything to the same product as long as it is not fat!
In these low-fat products, natural fats are being replaced with substances that are extremely harmful with some unknown ingredients listed on the food item. The food becomes highly processed and filled with unhealthy and natural additives to maintain taste and structure.
This explains why, even though we are constantly rushing to buy fat-free foods, the obesity epidemic in the world is still on the rise. Fat free is high in sugar and our bodies digest carbohydrates quite quickly! This results in blood sugar imbalance and cravings, making it more difficult to control the overall calorie intake. Trying to eat low-fat sweets will result in you eating more quantities of these sweets and resulting in a consumption of more calories. From a marketing perspective, the experts understood that when food is marketing as being healthier, we tend to eat more. And this is exactly what they are banking on!
For the sake of simplicity, this article is kept short. If you need more details, leave a comment.