Background Scalp psoriasis is reported to occur in 50–80% of psoriasis sufferers. Treatment of scalp psoriasis requires special consideration of product esthetics and staining potential due to the presence of hair.
Aim To evaluate the potential of a new, marketed liquor carbonis distillate (LCD; coal tar) solution to discolor naturally light or color-processed hair under exaggerated exposure conditions.
Methods Samples of naturally light and color-processed hair from a single donor were exposed to LCD solution repeatedly over 14 days and via submergence for 24 h. Color of LCD-treated hair samples was compared with untreated control hair samples.
Results LCD solution did not discolor naturally light or color-processed hair following repeated exposures and 24 h submergence.
Conclusion The marketed LCD solution does not appear to discolor naturally light or color-processed hair.