People for the Ethical Treatment of Animals, or PETA, is quite well known for its controversial advertisements, going to great lengths in an attempt to get better treatment for animals. In 2008, PETA created a billboard claiming a link between autism and dairy products. The ad stated that “Studies have shown a link between autism and cow's milk.” The ad itself didn't say where to go to find such studies, however scientific journal articles on the same topic were easy enough to find. The null hypothesis would be that there is no link between autism and dairy products. The researcher's hypothesis is also that there is no link between autism and dairy, but they were looking for one. The Taylor and Francis Group, an information technology company, published a study in 2006 titled Health Implications of Milk Containing β-Casein with the A2 Genetic Variant. The study analyzes some diseases and what their relationship is with milk. Milk may contain A1 β-casein or A2 β-casein, most milk drunk by the public is A1. A1 β-casein has recently come under the microscope as many people are trying to find a link between it and autism, as well as numerous other conditions. The authors of the scientific journal article were looking to see if there was a correlation between dairy products and certain neurological conditions, including autism. There haven't been many studies done on this, and the article states several times that more information is needed. Nonetheless, the study states that “…preliminary data [were] provocative…” (98, Health Implications). The article discusses a study conducted in 1999 by Zhongjie Sun and Robert Cade, in which rats were infused with varying levels of β-casomorphin-7, or β-CM 7, a bio… medium of paper… . ..ded, and neither article demonstrated a link. Scientific journal articles discussed what could be done in further research, where PETA did not necessarily imply that further research was needed. Finding a link between autism and dairy could potentially help many people, however, there has been no significant evidence to prove the link. ReferencesBell, S. J., Grochoski, G. T., & Clarke, A. J. (2006). Health implications of milk containing β-casein with genetic variant A 2. Critical reviews in food science and nutrition, 46(1), 93-100. doi:10.1080/10408390591001144Harrison Elder, J., Shankar, M., Shuster, J., Theriaque, D., Burns, S., & Sherrill, L. (2006). The gluten- and casein-free diet in autism: results of a preliminary double-blind clinical study. Journal of Autism and Developmental Disorders, 36(3), 413-420. doi:10.1007/s10803-006-0079-0