Some experts recommend supplements of calcium, vitamin D and vitamin B12 for seniors; check with your health care professional. As you age, it can be difficult to keep getting enough nutrients. Your need for vitamins and minerals may increase slightly due to problems absorbing nutrients, even as your caloric needs decline.It's even more important for older people to stay hydrated. Age can bring a decreased sensitivity to thirst. Moreover, it's sometime harder for those who are feeble to get up and get something to drink. Or sometimes a problem with incontinence creates a hesitancy to drink enough. Those who are aging should make drinking water throughout the day a priority.