Burns, Emily K., Ariadna Perez-Sanchez, and Rajani Katta. “Risks of Skin, Hair, and Nail Supplements”. Dermatology Practical & Conceptual 10, no. 4 (October 26, 2020): e2020089. Accessed April 25, 2026. https://www.dpcj.org/index.php/dpc/article/view/dermatol-pract-concept-articleid-dp1004a89.