Vitamin A (retinol) References



Armstrong AW, Cheeney S, Wu J, et al. Harnessing the power of crowds: crowdsourcing as a novel research method for evaluation of acne treatments. Am J Clin.Dermatol. 12-1-2012;13(6):405-416.
Bjelakovic G, Nikolova D, Gluud LL, et al. Antioxidant... read more