Calories. Everyone talks about them and everyone counts them. But do we really know how to do that? There is a certain number of calories that we should eat per day and this number is important mainly for those wo are struggling to lose or gain some weight. Because once you know what amount of calories you have eaten and how much you should it is a lot easier to do that.

But the truth is, not many people know what 100 calories looks like! And to be honest, it is not always that easy to tell. However, if you watch this video perhaps it will help you to get to know how much is just the right amount. Can you guess how many grams of olive oil has 100 calories? Well, you will find out. Enjoy!