Tryptophan load test helps in the evaluation of deficiency of the vitamin______________?
Correct answer: D. Pyridoxine
- A. Folic acid
- B. Niacinamide
- C. Cyano cobolamine
- D. Pyridoxine
Explanation
A tryptophan load normally produces niacin through a pathway requiring pyridoxal phosphate. In vitamin B6 deficiency, abnormal tryptophan metabolites accumulate, making this test useful for detecting pyridoxine deficiency.
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