All calories are not the same. It’s useful to think of calories as good and bad.
For example there are calories in every food. In everything we eat there are calories. But there are different types of calories. Well not exactly. The proper way to say this is, nutritional value.
So for example, a chocolate bar could have 150 calories. A banana could have 150 calories. But a chocolate bar has much less nutritional value. If any.
Nutritional value
Nutritional value means what the food can give you in terms of what you need to be healthy.
Unfortunately cakes, biscuits, sweets and chocolates have low nutritional value. When we eat these we are taking in calories. But these calories aren’t much use to us. So why do they taste so good? I don’t know. Something went wrong in evolution maybe?
Anyway the stuff which is good for us also tastes good. If you’re not convinced give it a chance. All fruit and vegetables have high nutritional value. They are good for us.