Describe a nutritional problem that older people may be at the risk of developing.

I think the most common nutritional problem in adults is
obesity which can lead to type 2 diabetes (among many other health
issues).

People with type 2 diabetes, unlike type 1,
actually produce insulin.  Typically, they are not producing enough
or their bodies are not using the insulin adequately.  The disease can affect anyone,
but the risk is much higher for those who are
obese.

Medical experts agree that the number one factor
affecting the development of type 2 diabetes is weight/nutrition control.  The more
fatty tissue the body has, the more resistant the cells become to insulin.  Older people
are at a high risk for developing this disease for a number of reasons.  As people age,
they tend to become less active.  Also, the body changes dramatically as it ages. 
Changes in metabolism and hormonal levels make weight maintence even more difficult. 
Stress and time management often negatively affects weight.  Because older people in
general are at a high risk of obesity they are necessarily also at
a high risk of developing type 2 diabetes.