Weighty concerns: the growing prevalence of obesity among older adults.

The prevalence of obesity among older adults has increased during the past 20 years and will affect both medical and social services. Along with an increased risk of cardiovascular disease, diabetes, and several cancers, obesity is associated with increased risk of physical and cognitive disability. However, relatively little attention has been given to the issue of weight management among community-dwelling older adults. Intentional weight loss in obese older adults has not been widely advocated by health care providers due to the uncertainty of whether the benefits outweigh the risks. Limited data in older adults show that intentional weight loss is effective in improving diabetes, cardiovascular risk factors, and physical function. This review describes the changes in body composition associated with aging, the consequences of obesity in older adults, and the effect of intentional weight loss on chronic disease risk factors and physical function. Recommendations for weight loss in obese older adults that minimize the likelihood of adverse effects on muscle mass, bone density, or other aspects of nutritional status are reviewed. Specific recommendations for macronutrient intake, in particular protein, and selected micronutrients, vitamin D and B-12, as well as dietary fiber, and fluid intake as part of a hypocaloric diet and recommendations for physical activity are described. As part of the health professionals team, dietetics practitioners need to be able to guide and manage weight loss treatment options on an individual basis by evaluating the potential benefits against the potential risks in obese older adults.