Prado, Giselle, Rebeca Teplitz, Richard Winkelmann, James Del Rosso, and Darrell Rigel. “Clinical Efficacy &Amp; Safety of Oral Polypodium Leucotomos Extract for Photoprotection: A Systematic Review”. SKIN The Journal of Cutaneous Medicine 2, no. 6 (November 9, 2018). Accessed October 26, 2024. https://skin.dermsquared.com/skin/article/view/413.