There is a great demand for knowledge implicating the effect of diet on immune status.
Humans continually try to link cancer with nutrition.
As yet, little sound information is available which clearly defines any type of relationship. Such is the case in swine nutrition as well. However, recently published research has shown a strong economic relationship between diet and health status. Iowa State University researchers have demonstrated the level of amino acids necessary in the diet is different when pigs are grouped in a low or high health status. There was an interaction between dietary nutrient level and nitrogen retention resulting in pigs having greater daily nitrogen retention as dietary lysine increased when immune activation was low.