This study was undertaken to investigate safety and scar-improvement activity of different applications of Juvista (avotermin), administered to surgical incisions made to the skin of a healthy population of male volunteers aged 18-45 years. The study addressed two issues: whether Juvista (avotermin) administered at 200ng/100μl/linear cm wound margin is more effective than 50ng/100μl/linear cm for scar improvement and, secondly, whether dosing once only (before wounding) or twice (before and after wounding) is optimal for scar improvement.