The following Mark's Daily Apple article was written by Marksissons and is narrated by Brock Armstrong.

Seven common calorie myths, we should all stop believing.

Many people think weight loss is simply about cutting calories.

They believe that to lose weight, you must reduce calories, either eat less or burn more.

To gain weight, you must add calories, and to maintain weight, you keep calories constant.

To these folks, calories in, calories out is the only thing that matters. They usually

oppose the primal blueprint because they assume that we deny the importance of calories in weight

loss. Well, they're wrong. I don't deny the importance of calories. Calories absolutely count.

And if someone has lost weight, they have necessarily

expended more calories than they consumed. That said, there are some major misconceptions about

calories, body weight, fat loss, and health. These calorie myths are often rooted in truth, but presented in black or white terms that are useless at best, harmful at worst, and do little to help the average person lose body fat.

Let's dig right in.

Calories in, calories out is all you need to know.

Simple is nice, simple is good, but overly simple is

dangerously inaccurate, so let's break this statement down.

What does calories in refer to?

Calories in, what we eat. We can't metabolize sunlight or oxygen.

We can't feast on the souls of the damned. The food we eat determines calories in, entirely, simple.

Calories out is where it gets confusing. There are several components to calories out.

Number one, resting energy expenditure. The energy used to handle basic day-to-day physiological functions

and maintenance. Number two, thermic effect of food. The energy used to digest food and process nutrients.

Number three, active energy expenditure. The energy used during movement, both deliberate activity

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