Astaxanthin is a keto-carotenoid. Like many carotenoids, astaxanthin is a lipid-soluble pigment. Astaxanthin is found in microalgae, yeast, salmon, trout, krill, shrimp, crayfish, crustaceans, and the feathers of some birds. It provides the red-orange color of salmon meat and the red color of cooked shellfish.

1. Astaxanthin applied in food field, it is mainly used as food additives for pigment and health care.
2. Astaxanthin applied in animal feeds field, it is used as an new animal feed additive to impart coloration, including farm-raised salmon and egg yolks.
3. Astaxanthin applied in pharmaceutical field, it is mainly used to prevent cancer and anti-oxidant.
4. Astaxanthin applied in cosmetic field, it is mainly used to Antioxidant and UV protection.