Zeaxanthin

Figure 1. The chemical structure of Zeaxanthin.

Zeaxanthin is one of the most common carotenoids in nature. Zeaxanthin is synthesised in plants and some micro-organisms. It is a yellow-coloured pigment that gives paprika, corn, saffron, goji (or wolfberries), and many other plants their characteristic colour.

Zeaxanthin is one of two major carotenoids that are found in the human eye (the other being Lutein). In the human eye, Zeaxanthin is found in the center of the macula, i.e. the most sensitive part of the retina with the most photoreceptors. Zeaxanthin may play a role in protecting the eyes from the harmful effects of oxidation and light-induced damage. Studies have also suggested that Zeaxanthin may help delay or prevent the progression of eye diseases such as cataracts and age-related macular degeneration (AMD).

Zeaxanthin is isomeric (i.e. molecularly equivalent) with Lutein. For nutritional values, refer to the Codex entry for Lutein.