A 4-year-old previously healthy girl develops an intermittent red, scaly rash over her face, neck, hands, and legs. This is followed by developmental delay, emotional lability, and episodic cerebellar ataxia. She is diagnosed with Hartnup’s disease. Her condition may respond to large supplementary doses of which of the following?

a. Vitamin C

b. Nicotinamide

c. Thiamine

d. Pyridoxine

e. α tocopherol

the answer is below…

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