A study by Rudel et al, published in the journal Environmental Health Perspectives, found that BPA and DEHP (phthalate) exposures were substantially reduced when participants’ diets were restricted to food with limited packaging.

BPA and phthalates, both potent endocrine (hormone) disruptors, are commonly used in plastics and resins for food packaging. Researchers measured the effects of plastic food packaging on the concentrations of these chemicals in the human body before, during, and after a “fresh foods” diet, meaning one devoid of plastic wrap and canned foods.  They found that these chemicals were reduced by well over 50% within just three days when participants diets were restricted to foods with limited packaging. 

For more information on chemicals in food packaging, see this summary.