J. Wadstein, and E. Thom. “A Randomized, Placebo-Controlled Doubleblind Parallel Group Study in the Treatment of Aging Symptoms of the Skin Using Topical and Oral Treatments”. Journal of Applied Cosmetology 31, no. 1/2 (June 1, 2013): 31/40. Accessed November 15, 2026. https://scientificeditorial.com/index.php/JAC/article/view/A-randomized-placebo-controlled-doubleblind-parallel-group-study.