How Many Calories Should You Eat Per Day to Lose Weight?And Stay Healthy,

How Many Calories Should You Eat Per Day to Lose Weight?And  Stay Healthy.

What's in a calorie?

A kcal is a unit of energy contained in food and drink. UK guidelines currently advise an average of 2,000 calories per day for women, 2,500 calories for men and 1,800 for children aged 5 to 10. These guidelines help steer us in the right direction but they are approximate figures. If you're keen to find out a more accurate figure you need to work out your Totalaily Energy Expenditure.
 Now all foods have calories and different foods have different amounts of calories. Calories are provided by fat, carbohydrate, and protein.

Fats have the highest concentration of calories. That's nine calories per gram of pure fat. Protein and carbohydrates each have four calories per gram of pure protein or pure carbohydrate. Alcohol, pure alcohol, has seven calories per gram. So understanding the role of calories in your diet can help you balance your calories in with your calories out, and help you achieve weight management goals. 

There are two types of calories:

1.  A small calorie (sympbol: cal) - 1cal is the amount of energy required to raise one gram of water by one degree Celsius.
2.  A large calorie (symbol: Cal, kcal) - 1Cal is the amount of energy required to raise one kilogram of water by one degree Celsius.

 1 large calorie (1kcal) = 1,000 small calories.