Then, as we grow up, our relationship with sugar often becomes more conflictual, full of guilt and confusion. Difference between sugars: glucose, fructose and the problem of “free sugars”The first mistake we make is enclosing everything in one word. Under the heading “Carbohydrates” you will always find the wording “of which sugars”: that is the value that tells you exactly how many simple sugars there are in 100 grams of product. How much sugar to eat per day: WHO guidelinesThe World Health Organization (WHO) guidelines are clear: free sugars should not exceed 10% of your daily calorie intake. You can live peacefully and healthy by consuming free sugars even every day.