Abstract: Redox balance exists in animals, which maintains a relatively stable state under normal physiological conditions. This balance will be broken when the environment or the state of animal itself changed, thus leads to the occurrence of oxidative stress. Studies have found that there are many factors can cause oxidative stress, such as changes of environment and physiological conditions, as well as pathogens and viruses infection. Oxidative stresses caused by these factors could affect animal health, production performance and reproductive function in different degrees, and even cause animal death. Therefore, it is of great practical significance to seek and add safe and effective antioxidant agents to regulate the redox state of animals. At present, the main nutritional additives for animal oxidative stress regulation including probiotics, vitamins, microelement, hormones and plant active substances. This review summarized the main causes of oxidative stress in animal and their impact on animals, and also concluded nutritional feed additives with the function of alleviating animal oxidative stress, in order to provide reference for further study of animal oxidative stress and its relieving strategies.

Key words: animal oxidative stress, stress factor, stress effect, nutritional regulation, antioxidants