“The Stimulatory Effect of Porcine Placenta Extract on in Vitro Biological Activities of Keratinocytes and Fibroblasts ”. Tropical Journal of Natural Product Research 9, no. 9 (September 30, 2025): 4353 – 4360. Accessed December 29, 2025. https://tjnpr.org/index.php/home/article/view/7368.