Calories are the energy in food and beverages, allowing you to move, breathe, and survive. The number of calories a person needs per day varies depending on several factors, such as age, height, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." You're probably familiar with how calorie counting works for weight loss and gain. If you take in ...

As such, this reduces their need for energy. For example, from age 19–25 years, the recommended intake for females is between 2,000–2,400 calories a day. But from 61+, this range drops to 1,600–2,000 ...