The Role Of Nutrition In Our Health Practice Test

Which statement about vitamin D is true?

Deficiency is linked to higher infection risk. It has no role in immune function. It is only produced in the skin through sunlight and has no dietary sources. It is primarily a calcium supplement.

Correct Answer:

Deficiency is linked to higher infection risk.

Explanation:

Vitamin D status affects immune function. When levels are low, the body's defenses against infections can be weaker, because vitamin D helps modulate immune responses and support antimicrobial defenses. That makes the statement about deficiency being linked to higher infection risk true. Vitamin D comes from both sun exposure and dietary sources like fatty fish and fortified foods, and while it aids calcium absorption, its role goes beyond simply acting as a calcium supplement, extending to immune support as well.

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