Causes of Morbid Obesity
* Genetic Factors
Numerous scientific studies have established
that your genes play an important role in your tendency to gain excess
- The body weight of adopted children shows
no correlation with the body weight of their adoptive parents, who feed
them and teach them how to eat. Their weight does have an 80 percent
correlation with their genetic parents, whom they have never met.
- Identical twins, with the same genes,
show a much higher similarity of body weights than do fraternal twins,
who have different genes.
- Certain groups of people, such as the
Pima Indian tribe in Arizona, have a very high incidence of severe obesity.
They also have significantly higher rates of diabetes and heart disease
than other ethnic groups.
We probably have a number of genes directly
related to weight. Just as some genes determine eye color or height, others
affect our appetite, our ability to feel full or satisfied, our metabolism,
our fat-storing ability, and even our natural activity levels.