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Blood Sciences

Blood Test Information

(a.k.a 5-hydroxyindoleacetic acid, serotonin metabolites)
24 Hour Urine (acid Preservative)(Phone (82)4712 to order)

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Tube type: Acid 24hr Urine

Special instructions
Sent away to Bristol Royal Infirmary

Reference range

mmol/mol (5HIAA/Creatinine)

Turnaround Time
28 days

Department: Biochemistry

Clinical Application
Please note dietary and medicinal restrictions must be followed. Please avoid the following foods for at least 24 hours prior to starting the urine collection and during the collection: Fruits in general, especially bananas, plums, kiwi, pineapple (and juice), tomato (including all tomato based foods/sauces), aubergine and avocado. Nuts in general, especially walnuts. As well as the foods listed above, SSRIs may also cause elevations in 5HIAA, but stopping these medications for the collection may not be appropriate.

» Patient Instructions for 5HIAA Acidified 24hr Urine Collection


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