• The Role of Phytonutrients in Skin Health – Julie A. Evans – Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, USA – 2010.
• You Are What You Eat: Within-Subject Increases in Fruit and Vegetable Consumption Confer Beneficial Skin-Color Changes – Ross D. Whitehead – School of Psychology, Perception Lab, University of St Andrews, St Andrews, Scotland - 2012.
• Tratado de Fitofármacos y Nutracéuticos, Dr. J. Alonso – Pág. 37 a 41.
• Anais Brasileiros de Dermatologia, Official publication of the Brazilian Society of Dermatology – Vol 89 Nº 6 Supl. 1 – 2014 – Pág. 30 a 36. • Dietary Carotenoids Contribute to Normal Human Skin Color and UV Photosensitivity – Simon Alauf, Ulrike Heinrich – InstitutfürExperimentelleDermatologie, Universität Witten-Herdecke, Witten, Germany – 2002.