Vitamin D in Seniors

Definition

Essential nutrient in older adults, synthesized by the skin and absorbed by the intestines, regulating calcium and phosphorus for bone health and immunity.

How it works

With age, skin vitamin D synthesis decreases by approximately 75%, and intestinal absorption also declines. Vitamin D is essential for calcium absorption, bone mineralization, muscle strength, and immune function. Deficiency increases the risk of osteoporosis, falls, fractures, and certain infections. Needs increase from 600-800 IU/day in adults to 1000-2000 IU/day in seniors.

Role

Regulates calcium absorption, strengthens bones, muscles, and the immune system.

Examples

• Fatty fish (salmon, mackerel, trout)
• Egg yolk
• Fortified dairy products
• Mushrooms (exposed to sunshine)
• Moderate sun exposure

Recommendations

Ensure an intake of 1000-2000 IU/day through diet and/or supplementation. Encourage moderate sun exposure (15-30 minutes per day). Regularly monitor serum vitamin D levels in at-risk seniors.

Key takeaway

Vitamin D is essential in the elderly to prevent osteoporosis, falls, and strengthen immunity.

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