Triple protection delivery system for retinaldehyde: Preparation, skin penetration and controlled release at the hair follicles.Authors:P. Supmuang, S. WanichwecharungruangAffilation:Chulalongkorn University, THPages:130 - 133Keywords:retinal, chitosan, hair follicle, skin, deliveryAbstract:Vitamin A and its derivatives including retinaldehyde possess serious instability problem.