Capsanthin is a natural red dye of the xanthophyll class of carotenoids.

Capsanthin is the main carotenoid in the Capsicum annuum species of plants including red bell pepper, New Mexico chile, and cayenne peppers (Capsicum annuum) and a component of paprika oleoresin.

[3][4] Xanthophyllic carotenoids such as β-carotene, lutein, and zeaxanthin have often been touted for their ability to help eye functionality.

Capsanthin may also be able to support eye health and recent research has revealed its potential to help maintain intraocular pressure within a healthy range.

A clinical study on Wistar rats explored this effect over the course of 28 days.