Which factor does NOT contribute to Vitamin D deficiency in older adults?

The factor that does not contribute to Vitamin D deficiency in older adults is excessive exposure to sunlight. In fact, adequate sunlight exposure is crucial for the synthesis of Vitamin D in the skin. When the skin is exposed to sunlight, it produces Vitamin D, which is essential for maintaining bone health, immune function, and overall well-being.

Conversely, other factors such as decreased exercise, diminished renal function, and decreased body mass can lead to Vitamin D deficiency. Decreased exercise can limit outdoor time, leading to less sunlight exposure. Diminished renal function affects the conversion of Vitamin D into its active form, and decreased body mass may reduce the storage capacity for Vitamin D, further contributing to deficiency. In summary, too much sunlight exposure is beneficial, while the other factors mentioned hinder the body's ability to maintain sufficient Vitamin D levels.