Obesity treatment or weight loss is important as weight loss reduces the complications of obesity. It decreases chances of heart disease, diabetes, high blood pressure, stroke or hyperlipidemias. After weight loss, the metabolism of the body slows down and fewer calories are consumed. Hence weight loss is never easy. Lost weight may be regained (Recidivism). A person has to watch his weight regularly, exercise regularly and continue diet precautions usually lifelong.
Some times losing weight rapidly by consuming a very low fat diet may result in iformation of gall bladder stones. In them increasing fat in diet may reduce the risk of gall stones.
There are only 2 options: either burn more calories or reduce their intake in food.
The first option is more troublesome as very little calories are consumed in daily activities. A person who is hardly doing any physical work consumes only 1200 to 1500 calories a day.
Each gram of fat provides 9 cal while proteins and carbohydrates provide about 4 cal each.
About 20 – 25 cal/kg body weight will maintain a constant body weight. In order to reduce the weight about 500 cal less than this would be sufficient.
The initial goal may be to reduce weight by 5 to 7 %. Most of the obese patients report less intake of food than they actually consume.
Fats should form only < 30 % of the calories and should preferably be polyunsaturated. Proteins can form upto 45% and remaining provided by carbohydrates. Very low calories, mediterranean and other various diets have been found to be less useful but are more fashionable in various countries.