This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. There’s some truth to the saying ”calories in, calories out” when talking about weight management. However, not all calories are ...

Calories keep your body fueled and functioning properly, but what exactly is a calorie and how many do you actually need? Reviewed by Dietitian Christa Brown, M.S., RDN, LD Calories are units of ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. If you want to start ...

Interpreting a food label is a key skill to have.

If you’ve ever tried to lose weight, you’ve probably heard about the importance of “calories in versus calories out.” This concept is based on the idea that as long as you eat fewer calories than you ...

If you have been advised to go on a low-calorie diet, you may be scratching your head trying to understand exactly what it entails. Since there is no true definition of the term “low-calorie diet,” ...

These days, when we talk about diet, the one term that we hear incessantly is ‘Calories’. With infinite food and nutrition influencers sharing their wisdom online, we often end up overwhelmed with the ...

What follows are five short reasons (there are a whole lot more and for detailed list see my most recent book; The Fallacy of the Calorie: Why the Modern Western Diet Is Killing Us and How to Stop It) ...

As a personal trainer, I frequently am asked by my clients about the exercises that burn the most calories. I usually respond by explaining that other indicators — like strength, endurance and heart ...