Mean initial CIE L*a*b* values across 35 participants.

L* represents skin lightness (0–100), a* represents position on a green-red axis (−60 to +60) where positive values are red and b* represents position on a blue-yellow axis (−60 to +60) where positive values are yellow. Overall values represent average skin-color across seven body regions (left cheek, right cheek, forehead, volar forearm, outer bicep, shoulder and palmar thenar eminence). Face values represent the average of the three facial measurements. Delta (Δ) values represent six-week changes in skin-color values.