Unfortunately, recent revisions of the Recommended Daily Allowances by the USDA do not distinguish among older adults of various ages. There is just one set of RDA's for people over 50, but most experts agree that the dietary needs of people in their 50's or 60's are different from people in their 70's and 80's. As we age, physical changes occur in the body. These include the loss of muscle tissue and usually a decreased level of activity. When eating less food, older adults must be careful to select foods that are nutritious so they do not miss needed nutrients in their diets.
Insufficient nutrition can lead to chronic fatigue, depression, and a weakened immune system.
Vitamin D is necessary for calcium absorption. Naturally, since it is well known that calcium is responsible for strong bones and teeth, lower levels of calcium may mean an increased risk of fractures and related problems. This means an even greater need for it nutritionally. One can find this vitamin in liver, fish, and dairy products. Older adults also seem to require more Vitamin B6 than younger adults do.