Third, There are Opioid in cheese with properties similar to Morphine. Looking at the study the European Food Safety Agency, in response to a number of studies and public health concern, did a scientific literature review in 2009 to assess the potential health impact of casomorphins and similar biologically active peptides . Much of the review centers addressing the overarching question (although several avenues were explored in detail): Do casomorphins have potentially deleterious health effects? The concern of course stemming from the addictive capacity of opioid drugs.