A novel LCD (coal tar) solution for psoriasis does not discolor naturally light or color-processed hair in an exaggerated exposure test model.
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.


OBJECTIVE
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.


CONCLUSIONS
The marketed LCD solution does not appear to discolor naturally light or color-processed hair.
Johnson
Colleen
C
NeoStrata Company, Inc., Princeton, New Jersey 08540, USA.
Edison
Brenda
B
Brouda
Irina
I
Green
Barbara
B
D003033:Coal Tar / Q000627:therapeutic use*; D006197:Hair / Q000187:drug effects*; D006200:Hair Color / Q000187:drug effects*; D006202:Hair Dyes / Q000494:pharmacology; D006801:Humans; D011565:Psoriasis / Q000188:drug therapy*; D012535:Scalp / Q000187:drug effects*
D006202:Hair Dyes; D003033:Coal Tar