Prof. Dr. Sibel Ozilgen explains four most common natural pigments and the ways to protect them during processing as a part of 'Foods and Their Specifications' course at the Gastronomy and Culinary Arts Department, Yeditepe University. Carotenoids are the main pigments found in orange and yellow fruits and vegetables such as carrots, oranges, bell peppers, and pumpkin. They are oil soluble and less sensitive to heat compared to the other pigments. Beta-carotene is a precursor of vitamin A.