It is well accepted that diet has far-reaching effects on the physiology of lab animals. Targeted phenotypes can be purposely induced by using specific diets, allowing the researcher to test their hypotheses. Like other areas of study, immunology is a field in which attention must be paid to the diet being fed, since changing the diet composition could result in a different immunological phenotype. This requires that researchers understand the differences between grain-based (GB) chows and purified ingredient diets, and unfortunately, many investigators (immunologists or not) are unaware of these differences. To read more, see our Product Literature.