Which one of the following is a characteristic of vitamin D nutrition?

Question

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Vitamin D is synthesized in the skin through exposure to UVB radiation from the sun. Therefore, individuals who are exposed to less sunlight, such as those living in northern latitudes, during the winter months, or who have darker skin tones, may require more dietary vitamin D to meet their needs. Option A is incorrect, as vitamin D is essential for proper bone mineralization and increased intake improves, not alters, bone composition. Option B refers to excessive intake of calcium, not vitamin D, which can lead to mineral deposits in the gallbladder. Option C is incorrect, as while fortified milk is a source of vitamin D, it is not the major dietary source of the nutrient in the Canadian population.

Which One of the Following Is a Characteristic of Vitamin