... a bright red carotene and carotenoid pigment and phytochemical found in tomatoes and other red fruits & vegetables, In plants, algae, and other photosynthetic ... carotene, responsible for yellow, orange or red pigmentation, photosynthesis, and photo-protection. Structurally, it is a tetraterpene ... conjugated double bonds give it its deep red color and are responsible for its antioxidant activity. Due ...