👉 Purpuroxanthin is a type of pigment found in fish and some other seafood products. It's often called "blue dye" as it gives colors to many foods, including eggs, vegetables, and even apples or oranges. Purpuroxanthin is a molecule that contains an oxygen atom bonded to 15 carbon atoms, making it a member of the family of carotenoids (colorful pigments). It's found in the skin, eyes, and hair