Obesity is a medical condition defined as excessive accumulation of body fat that leads to health problems like heart disease, type 2 diabetes, obstructive sleep apnea, certain types of cancer and osteoarthritis.
BMI (Body Mass Index) is simple tool that is generally used to estimate the total amount of body fat.
A change in BMI over a short period of time is often used to measure the change in one’s lifestyle habits.
A Normal person has 30 to 35 billion fat cells. When a person gains weight, the fat cells grow in their size and as they put on more weight, the fat cells start increasing.
The normal fat cells are 0.4 to 0.6 microgram in weight; the cells of an obese person can weight as much as 1.2 micrograms.