Obesity

According to US centers for disease controls, complication from obesity and related problems, such as diabetes and heart disease, cause 112,000 premature deaths and accounts for 75 billion in extra medical cost in the united states.

According to the Centers for Disease Control and Prevention (CDC), Americans are eating more calories on average than they did in the 1970s. Between 1971 and 2000, the average man added 168 calories to his daily fare, while the average woman added 335 calories a day. What’s driving this trend? Experts say it’s a combination of increased availability, bigger portions, and more high-calorie foods.

Not surprisingly, we’re also eating more high-calorie foods (especially salty snacks, soft drinks, and pizza), which are much more readily available than lower-calorie choices like salads and whole fruits. Fat isn’t necessarily the problem; in fact, research shows that the fat content of our diet has actually gone down since the early 1980s. But many low-fat foods are very high in calories because they contain large amounts of sugar to improve their taste and palatability. In fact, many low-fat foods are actually higher in calories than foods that are not low fat.

Obesity related Physical health problems

 high blood pressure or heart disease

 type-2 diabetes

 sleep apnea and other breathing problems

 abnormal or missed menstrual cycles

 bone and joint problems

 reduced balance

leptin play important role in obesity

It is the original “hungry hormone.” Like all hormones, leptin is a chemical messenger. When it comes to leptin, the message leptin sends is “I’m full.” Leptin is produced by fat cells, travels through the blood stream and then works in appetite centers of the brain, signaling feelings of fullness. When leptin levels are low, you feel hungry and are motivated to seek out food.

People with leptin deficiency are hungry all the time and very overweight.