Our body composition changes with age. Aging is associated with an increase in total body fat, as well as a shift of that fat distribution. An older individual has higher total body fat and visceral fat (fat surrounding the organs). While routine physical activity may help lessen this shift, some degree of change is inevitable. To some extent, a small increase in overall fat may be healthy. Think of it this way—if you slip and fall, you will likely fare much better with adequate fat tissue to pad and protect your bones.
You can find trusted nutrition information in the Dietary Guidelines for Americans, which contain advice about what and how much to eat and which foods to avoid. Every 5 years, the U.S. Department of Agriculture (USDA) and U.S. Department of Health and Human Services use the latest nutrition research to develop these Guidelines that encourage people to eat healthier.