Feed-grade astaxanthin is a natural, highly potent antioxidant that comes from the fat of a bony fish called shrimp. In shrimp, astaxanthin binds to proteins and effectively protects cells from free radical damage. In the development process of feed-grade astaxanthin, scientists extracted these valuable antioxidants and became an important contributor to human health and environmental protection. Firstly, feed-grade astaxanthin is of great significance for human health. Fish is one of the important sources of nutrients in our diet. However, due to environmental pollution and stress and other factors, fish will accumulate a large number of free radicals, these free radicals will cause potential harm to human health. The feed-grade astaxanthin can effectively remove these free radicals and protect the human body from harm. Secondly, feed-grade astaxanthin also has an important contribution to environmental protection. With the increase of human activities, environmental pollution is becoming more and more serious, and many species are facing the danger of being endangered. Astaxanthin can effectively protect fish from environmental stress and extend their life span, thus protecting the balance of the ecosystem. In addition, the application field of feed-grade astaxanthin is also very wide. In addition to being used in fish farming, it can also be used in the raising of poultry and livestock, and it also plays an important role in improving the nutritional value of meat and dairy products. At the same time, feed-grade astaxanthin can also be used in cosmetics, health products and other fields, making greater contributions to human health and environmental protection. In summary, feed-grade astaxanthin, as a natural antioxidant, not only has an important protective effect on human health, but also has an important contribution to environmental protection. We should pay more attention to the development and utilization of this natural resource, and make greater contributions to human health and environmental protection.