Profile: Wefirst Biotechnology Co., Ltd. is a biotech service provider. We focus on natural astaxanthin production applying microalga haematococcus pluvialis. Astaxanthin is a kind of red carotenoid which has important applications in the nutraceutical, cosmetics, food, and feed industries. Haematococcus pluvialis is the richest source of natural astaxanthin, and is cultivated at industrial scale. Astaxanthin is a potent anti-oxidant, with a free radical fighting capacity much higher than that of vitamin E. The structure of astaxanthin is very similar to that of lutein and zeaxanthin. It has a stronger anti-oxidant activity, and UV-light protection effect. The deposition of astaxanthin in the eye can provide superior protection against UV light and oxidation of retinal tissues, pointing to the potential of astaxanthin for eye health maintenance.