MacuShield Gold provides a fortified MacuShield formulation with added vitamins and minerals. Scientific research shows that the three nutrients; meso-zeaxanthin, lutein and zeaxanthin 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 specialised parts of the eye, responsible for a central detailed vision. Lutein and zeaxanthin can be found in fruits and 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.