Yes! Severely obese individuals may lose as many as 14 years off their life.
20 previous studies were pooled and it was found that a body mass index (BMI) of more than 40 raised the odds of dying early from heart disease, cancer, and diabetes compared to people of normal weight (BMI 20-25).
The lead investigator of the U.S. National Cancer Institute study found that the death rates in severely obese adults were about 2.5 times higher than in adults of normal weight range.
We know that not becoming obese will extend your life… it is unsure if after being severely obese if weight loss would markedly increase life span.
For more information on obesity, visit http://www.nlm.nih.gov/medlineplus/news/fullstory_147194.html