What is calorie definition?

A calorie is a unit of energy commonly used to measure the energy content of food and the amount of energy expended through physical activity. One calorie is defined as the amount of energy required to raise the temperature of one gram of water by one degree Celsius.

In nutrition, the term calorie is often used to refer to the larger unit of measurement, the kilocalorie (kcal). One kilocalorie is equal to 1,000 calories and is typically used to measure the energy content of foods and beverages.

The human body requires a certain number of calories each day to maintain basic bodily functions and carry out physical activities. The number of calories that an individual needs depends on factors such as age, sex, weight, height, and activity level.

Excess calorie intake can lead to weight gain and increase the risk of obesity and related health problems, such as diabetes and heart disease. On the other hand, consuming too few calories can cause a reduction in metabolic rate and lead to malnutrition. Proper calorie intake is important for maintaining a healthy weight and overall well-being.