A calorie is the standard unit for measuring energy. 
Food CALORIES supply energy to the body.

It is important to maintain a balance between calories intake 
and energy expenditures. 

The surplus leads to overweight or obesity which increase risk
for morbidity and mortality. Hypertension, dyslipidemia, 
coronary heart disease, diabetes, gallbladder disease, 
respiratory disease, some types of cancer, gout, and arthritis are
considered being obesity-related health problems.
Weight loss is critical to reduce bad cholesterol levels, reduce high
blood pressure and lower elevated blood glucose.

Experts have concluded that the body mass index (BMI)provides patients
and doctors with the most accurate information about ideal weight.

The formula for calculating BMI in pounds and inches is: 

[Weight in pounds x 700] divided by [height
in inches squared] = BMI 

Over 30 is obese, 25-30 is overweight and below 25 is normal. 


Try to avoid "empty caloric" foods which are high in calories
from sugar or/and fat with few other nutrients.

The U.S. national recommendation is a daily total food diet 
consisting of the following caloric breakdown: 

-60% carbohydrate
-30% fat
-20% protein