Zeaxanthin

What is zeaxanthin?

Zeaxanthin is a yellow-orange carotenoid closely related to lutein. It is found in corn, orange peppers, egg yolks, goji berries and leafy greens. In the eye it is concentrated even more tightly than lutein at the very center of the macula, the fovea, where the sharpest vision happens. Together the two pigments are called macular pigment. They absorb blue light and neutralize reactive oxygen molecules, which is the reason they are studied for eye health. Commercial zeaxanthin is usually extracted from marigold flowers and is almost always sold in combination with lutein.

What the research says

Zeaxanthin has mostly been tested together with lutein, so it is hard to separate its effects. The key trial is AREDS2, run by the National Eye Institute in 4,203 adults aged 50 to 85 at risk of advanced age-related macular degeneration (AMD). Participants who received 10 mg lutein plus 2 mg zeaxanthin on top of the AREDS formula did not show a significant reduction in progression to advanced AMD in the primary analysis. Secondary analyses favored lutein and zeaxanthin as a replacement for beta-carotene, which was associated with more lung cancers in former smokers. The National Eye Institute now recommends the AREDS 2 formula, with 2 mg zeaxanthin, for people with intermediate AMD or late AMD in one eye, and says it does not prevent early AMD from progressing.

Randomized trials in healthy volunteers show that lutein and zeaxanthin supplements raise macular pigment optical density. A 2024 systematic review and network meta-analysis found that lutein plus zeaxanthin shortened photostress recovery time (how fast vision returns after a bright light) and that antioxidant supplements generally improved macular pigment and some contrast sensitivity measures. These are modest, measurable changes rather than proof of better everyday vision. Evidence for zeaxanthin against digital eye strain is preliminary.

How it’s used in supplements

Most eye formulas pair zeaxanthin with lutein at roughly 1 part zeaxanthin to 5 parts lutein, echoing AREDS2. Some products use higher ratios or add meso-zeaxanthin, a related form. As a fat-soluble pigment, it is best absorbed with a meal containing some fat. Food sources such as eggs, corn and dark leafy greens provide smaller amounts alongside other nutrients.

Zeaxanthin is generally well tolerated in studied doses. Long-term safety data above about 10 mg per day are limited. People with a diagnosed eye condition should talk to an eye doctor before relying on any supplement.