Vital substance preparations with carotenoids in high as well as safe dosages can be found in Fairvital's online shop. Large selection and fast delivery! Carotenoids are naturally occurring colourings that can be found in plant foods. Carotenoids are an important part of our daily diet. The three most common carotenoids are beta-carotene, lutein and lycopene. Discover astaxanthin, the most powerful carotenoid in the plant world.