"If slaughterhouses had windows,
everybody would be vegetarians!"
How choosing organic foods whenever possible, especially when it comes to foods with corn, soy, sugar ingredients and looking for labels on dairy, meat and poultry that contain, "NO antibiotics, hormones, grass-fed, etc." -- coming from cruelty-free sources - can help you steer clear from contaminated, "Frankenfoods". -- It's a good rule of thumb until the foods are labeled being honest about contents...
Here's a cool link to info about preparing organic foods -- http://www.organicitsworthit.org/make