When it comes to dieting, there are a lot of myths and old wives’ tales that get in the way of making good decisions. What’s worse is that some people will even tell you they’ve got the best solution for everyone, no matter what your body type or activity level. This article will explain how you can use science and math to determine just how many calories you need on a daily basis so that you can make an informed decision about what kind of diet will work best for you.

What are calories?

• Calories are a measure of energy. They tell you how much energy is in the food that you eat, which helps your body function and grow.
• The amount of calories in an apple is different from the amount of calories in an orange or an avocado–even though they all have approximately the same number of grams