Here, as in many areas, prevention is better than cure. Losing weight is easier the younger you are. Extra weight in almost all cases is caused by years of bad habits in behavior, exercise, and diet. This is most of the truth but not all of it. There are some unanswered questions.
Adoptees follow their natural parents in their weight.
Maybe there are also a very few as yet undiagnosed diseases causing obesity. You bet your life it does. At least 20 serious medical conditions are caused by obesity. The most important are bad knees, diabetes, high blood pressure, increased blood cholesterol, and hardening of the arteries. Up to three times one's weight is transmitted through each knee and so any extra weight wears down the cartilage cushion in the knee extra quickly.