A single-centre triple-blind study looking at the addition of NAC to tumescent solution for liposuction and fat grafting in healthy patient volunteers already undergoing bilateral breast reduction. Three-dimensional reconstructions and volumetric analysis will be performed based on CT scans at 0, 1 and 3 months and then histological analysis will be performed after fat graft explantation at 3 months to determine fat graft vascularity and quality.