Medically reviewed by Kayla Girgen, RD The average adult woman needs about 1,600-2,400 calories a day.A calorie deficit, in ...

Corrections & clarifications: An earlier version of this story misspelled the name of the spokesperson for the Academy of Nutrition and Dietetics. She is Caroline Susie. Few things are as essential as ...

Obesity rates have risen in recent decades. In 2012, over 66% of the U.S. population had either overweight or obesity (1). If you eat more calories than you need for energy, weight gain can result.

You’ve heard the saying “calories in versus calories out” when it comes to weight loss. This is referring to a calorie deficit. But what is a calorie deficit, exactly? Basically, you need to take in ...

With so much talk about how to lose weight, it’s easy to forget that there are people who want to gain weight by building lean muscle mass, or “bulking.” To do this, you need to consume more calories ...

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