Can dietary furanocoumarin ingestion enhance the erythemal response during high-dose UVA1 therapy?

Beattie, Paula E; Wilkie, Murray J V; Smith, Gillian; Ferguson, James; Ibbotson, Sally H · J Am Acad Dermatol · 2007

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Abstract

As phototoxic skin reactions caused by psoralen are induced by wavelengths within the UVA1 spectrum, we assessed the potential of the small amount of psoralen in a normal diet to provoke phototoxicity in volunteers with skin types I and II. Threshold erythema was unaffected by ingestion of a 200-g portion of parsnip.

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