Carl is a practicing dermatologist with 40 years of skin research experience, 15 U.S. patents granted, and more than 50 scientific journal publications in the area of treatment of skin diseases and conditions, including chapters in 10 dermatological textbooks. He is the founder and CEO of Episciences, Inc., creator of Epionce. He also authored the book The New Ideal Skin Health, published in 2010. Along with these accomplishments, he has spent nearly three decades focusing on researching the skin barrier, cutaneous inflammatory conditions, and delivering ingredients and herbal medicines. His drive toward expertise in the dermatology field stems from his own skincare struggles. Two of his favorite sunscreens are Epionce Ultra Shield SPF 50 or Daily Shield Tinted SPF 50. Both have the Skin Cancer Foundation Seal of Recommendation as effective broad-spectrum sunscreens.