MacuShield is a lutein (10mg), zeaxanthin (2mg) and meso-zeaxanthin (10mg) once-a-day, easy to take, food supplement which combines all three macula carotenoids in a unique formula developed in collaboration with leading eye health experts.Scientific research shows that these three nutrients are found at the back of the eye, at the macula, where they form the macula pigment (yellow colour). Meso-zeaxanthin is particularly concentrated at the centre of this pigment. The macula is a specialist parts of the eye that is responsible for our detailed, central vision.Lutein and zeaxanthin can be found in fruits and dark green leafy vegetables and meso-zeaxanthin is present in some species of fish and seafood. The macula pigments in MacuShield are obtained from marigolds (Tagetus Erecta), specifically grown for this purpose.