CSSD Practice Exam 2026 – Complete Study Resource

The choice of Vitamin D as a micronutrient supplement is accurate because it is classified as a vitamin, which is a type of micronutrient essential for various bodily functions, including calcium absorption, bone health, and immune function. Micronutrients are needed in smaller quantities compared to macronutrients and play crucial roles in metabolic processes and overall health.

Vitamin D is particularly important because it can be obtained from sun exposure, certain foods, or supplements, especially for individuals who may have limited sun exposure or dietary intake. Unlike macronutrients such as proteins, carbohydrates, and fats, vitamins and minerals are vital in smaller amounts and do not provide energy in the form of calories, yet are crucial for optimal health.

While magnesium is also a micronutrient, it is not as commonly recognized as a supplement in everyday contexts compared to vitamins. Vitamin C, like Vitamin D, is indeed a micronutrient and often recognized as an essential nutrient in supplement form. Protein powder, however, is classified as a macronutrient supplement since it is primarily composed of proteins meant to provide energy and support muscle function. This distinction helps clarify why Vitamin D stands out as the commonly recognized micronutrient supplement in this context.