These carotenoids are sourced exclusively from our diets, and they are necessary for optimal vision performance. They come from dark green, leafy vegetables like kale and from brightly coloured fruits and also from some types of fish and seafood. If your diet is lacking in any of these, you may be consuming inadequate supplies of these nutrients. Macushield aims to boost this intake with an easy to take dietary supplement, helping you to be confident that you are supporting your eyes to the best of your ability.