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Genetically modified organisms (GMOs) can improve nutrition, but proponents' claims that they will solve world hunger are disputed. While GMOs may increase nutritional benefits, unintended effects can harm digestion and absorption of food. For example, GM soy, corn, and rice can cause novel allergies and alter gut flora, leading to inflammation and malabsorption. Additionally, fortified foods containing GM ingredients do not necessarily have higher levels of nutrients when the supplements are removed.