Clinical Nutritionist Practice Test 2026 - Free Practice Questions and Study Guide

Question: 1 / 400

Which vitamin is crucial for maintaining healthy vision?

Vitamin A

Vitamin A is essential for maintaining healthy vision due to its role in the production of rhodopsin, a pigment found in the retina that helps the eyes detect light. A deficiency in vitamin A can lead to night blindness and other vision problems, as it impairs the eye's ability to adjust to low-light conditions. Furthermore, vitamin A is vital for the health of the cornea, the outermost layer of the eye. It also supports overall eye health by contributing to the maintenance of the epithelial tissues. This is why it is specifically recognized for its importance in visual function and overall eye health, distinguishing it from the other vitamins listed, which do not have the same direct impact on vision.

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Vitamin D

Vitamin E

Vitamin K

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