Which statement is true about older adults' dietary intake of vitamins?

The statement regarding older adults' dietary intake of vitamins being lower is based on several factors that affect their nutritional status as they age. Older adults often experience physiological changes that can impact appetite, digestion, and absorption of nutrients. These changes may lead to a decrease in food intake or changes in dietary habits, which can contribute to insufficient vitamin consumption.

Furthermore, certain health conditions commonly seen in older adults, along with the use of medications, can also affect nutrient absorption and overall dietary patterns. For example, gastrointestinal issues may make it more difficult for older individuals to absorb specific vitamins adequately.

While some older adults may have adequate or even increased intake of certain nutrients due to dietary supplementation or focused dietary practices, the general trend shows that many older adults do not meet the recommended dietary allowances for various vitamins, particularly those that are crucial for maintaining health and mitigating the effects of aging. Thus, the lower dietary intake of vitamins in older adults reflects the combination of physical, behavioral, and health-related factors that are prevalent in this population.