Caffeine warning: The recommended dose of this product contains about as much caffeine as a cup of coffee. Limit the use of caffeine-containing medications, foods, or beverages while taking this product because too much caffeine may cause nervousness, irritability, sleeplessness, and, occasionally, rapid heart beat.
The list of signs and symptoms mentioned in various sources for Hartnup Disease includes the 23 symptoms listed below: 1  Itchy rash only on light exposed areas. 2  Headache. 3  Intermittent ataxia. 4  Abdominal pain. 5  Chest pain. 6  Pain in the extremities. 7  Crying spells. 8  Mental retardation if untreated. 9  Fainting.
Diagnosis of Hartnup disease: Prevalence of Hartnup disease can be learned by looking at the aforementioned symptoms. Since, in most cases the disease is asymptomatic (or even if symptoms are experienced) it may become necessary to undergo diagnosis to confirm the prevalence of the disease.