Which vitamin deficiency can be detected through specific blood tests?

Vitamin deficiencies can indeed be identified through specific blood tests, and this is true for vitamin C, vitamin D, and vitamin A. Each of these vitamins plays essential roles in the body, and their deficiencies can lead to distinct health issues.

Vitamin C deficiency, for example, can result in scurvy, which is characterized by symptoms such as fatigue, gum disease, and joint pain. Blood tests can measure the level of ascorbic acid (vitamin C) in the plasma to confirm deficiency.

Vitamin D is crucial for bone health and calcium metabolism. A deficiency in this vitamin can lead to conditions such as osteoporosis and rickets. Blood tests that measure the concentration of 25-hydroxyvitamin D are commonly used in clinical practice to assess vitamin D status.

Vitamin A is vital for vision, immunological function, and cellular communication. Its deficiency can cause night blindness and increase susceptibility to infections. Serum retinol levels can be measured through blood tests to evaluate vitamin A status.

Given that blood tests can effectively identify deficiencies in all three of these vitamins, the correct answer encompasses all of them.