Effect of NAC on wound healing. (A) Wound contraction area in burn, and burn + NAC group. Wound appearance following 14 days of treatment with NAC. (B-C) Wound healing area and wound healing rate. (D) Effects of NAC on hydroxyproline levels in the burn wound model. Control versus burn group, #P < 0.05; ##P < 0.01; and ###P < 0.001; Control versus Burn+NAC group, ΦP < 0.05; ΦΦP < 0.01; and ΦΦΦP < 0.001; Burn versus Burn+NAC group, *P < 0.05; **P < 0.01; and ***P < 0.001.