Slightly higher BMI lowers mortality in elderly
In adults over 70 years of age a higher BMI might have a protective effect. The mortality was lower by 13% than in the ‘normal’ weight BMI category, or the ‘obese’ category. The study that’s started in 1996 looked at almost 10 000 patients aged 70 to 75 years of age. The results of the study suggests that maybe a different BMI range should be considered as the desired weight range for adults over 70 years of age, and that maybe what is considered overweight might be the desired range.

Pennsylvania’s Lincoln University 
