What effect does aging have on the absorption of fat-soluble vitamins?

Aging influences the absorption of fat-soluble vitamins—specifically vitamins A, D, E, and K—primarily due to physiological changes in the gastrointestinal tract. As people age, there can be a decrease in the production of bile and pancreatic enzymes, both of which are crucial for the emulsification and absorption of dietary fats. This decline in digestive capability can lead to a diminished absorption efficiency of fat-soluble vitamins, making it harder for older adults to adequately assimilate these essential nutrients.

Additionally, age-related changes in the intestinal mucosa, such as reduced villi height and surface area, further contribute to decreased absorption. These structural changes impair the body’s ability to absorb not just fats but the vitamins that depend on fat for optimal uptake.

Given these factors, the assertion that aging results in decreased absorption of fat-soluble vitamins is well-supported by clinical observations and research on gastrointestinal health in the elderly.