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Pediatr Dev Pathol. 2003 Nov-Dec;6(6):547-51.

Quercetin, an over-the-counter supplement, causes neuroblastoma-like elevation of plasma homovanillic acid.

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Department of Pediatrics, Children's Hospital and Regional Medical Center, 4800 Sand Point Way NE, Seattle, WA 98195, USA.


A 22-month-old boy, who regularly consumed the oral dietary supplement, quercetin, was suspected erroneously of having a catecholamine-producing tumor, based on elevated serum and urine levels of the dopamine metabolite, homovanillic acid (HVA). Subsequent studies of healthy adult volunteers showed that significant elevations in plasma HVA are a consequence of quercetin ingestion.

[Indexed for MEDLINE]

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