Moisture in skin by near-infrared reflectance spectroscopy

Abstract

The nature of water binding in excised porcine skin was evaluated by near-infrared reflectance spectroscopy. Prediction equations for «free» water and «bound» water were derived using multiple regression analysis. The technique was also used to correlate the subjective evaluation of «moisturizers» via the dry leg regression method to near infrared wavelengths. The results indicate a high correlation between the ratings and near infrared wavelengths associated with water