Oral health and development are impacted by many things, but over the past few years, experts suggest that lifestyle and diet have a very substantial effect. Different foods and textures change the shape, growth and trajectory of the human mouth and jaw, and it is not always for the better. In a 2011 study conducted by the Department of Anthropology and School of Anthropology and Conservation at the University of Kent in the United Kingdom, the findings confirm a definitive difference in jaw and mouth shape between people from different cultures and societies. While most people may assume the differences are genetically-based, researchers attribute these differences to outside factors, such as diet and lifestyle.