food products are not always what they purport to be. reporter: 7% of america s food supply estimated to contain fraudulent ingredients. in this new review says these liquids in ground foods are most often doctored. expensive extra virgin olive oil diluted with cheaper vegetable oil. costly pomegranate juice adulteration, widespread. some diminished by grape or pear juice. tea bags filled with fern leaves and common lawn grass. pure lemon juice reduced by sugar and water. one had 10% lemon juice, one had 15%, another 25% and the last one had 35%. reporter: what can a consumer do? first, if you can, buy whole products. tea leaves, coffee beans, and pepper. grind them yourself. and be careful of super price cut. that s pretty cheap for extra virgin olive oil. and something that should raise eyebrows for a consumer.
trusted independent lab. food products are not always what they purport to be. reporter: 7% of america s food supply estimated to contain fraudulent ingredients. in this new review says these liquids in ground foods are most often doctored. expensive extra virgin olive oil diluted with cheaper olive oil. costly pomegranate juice adulteration, widespread. tea bags filled with fern leaves and common lawn grass. pure lemon juice reduced by sugar and water. one had 10% lemon juice, one had 15%, another 25% and the last one had 35%. reporter: what can a consumer do? first, if you can, buy whole products. tea leaves, coffee beans, and pepper. grind them yourself. and be careful of super price cut. that s pretty cheap for extra virgin olive oil.