Every time the topic of genetically modified (GM) foods comes up, it tends to strike a sensitive nerve among the public. According to reports from CCTV, the Ministry of Agriculture recently approved the import of three GM soybean safety certificates for processing purposes, reigniting the debate on whether GM crops are harmful or safe.
How can you tell if a food is genetically modified? Fan Zhihong, an associate professor at the College of Food Science at China Agricultural University, explained that if a product's main ingredient contains genetically modified components, it should be clearly labeled according to Chinese regulations. For consumers who wish to avoid GM foods, careful attention to labels is essential. For example, when purchasing soy oil, you may often see small print stating "raw material: genetically modified soybeans." However, there are no strict rules requiring processed foods containing GM ingredients to be labeled. For instance, many American fast-food chains use genetically modified potatoes for their fries, and restaurants often use oils derived from genetically modified crops in their dim sum and cooking. As a result, dining out or buying processed foods increases the likelihood of encountering GM ingredients. In contrast, locally grown fruits and vegetables (except papaya), along with peanut oil, are generally free from GM components. Foods like millet, red beans, and other traditional grains and legumes not only have high nutritional value but also rarely contain genetically modified elements.
Here are some general signs that might help identify genetically modified foods:
1. Seasonality: Except for greenhouse-grown produce, off-season foods are more likely to be genetically modified.
2. Color: If the color is unusually vibrant or different from traditional varieties—such as colored cotton or peppers—it could indicate genetic modification.
3. Shape: Traditional tomatoes have a natural, uneven shape, while small, uniformly shaped tomatoes, such as cherry tomatoes, are often genetically modified.
4. Taste: Traditional corn has a mild sweetness, whereas the highly sweet corn available today is likely genetically modified.
5. Pest resistance: Crops that are frequently attacked by pests are typically non-GM, while those that show strong resistance may be genetically modified.
6. Yield: In the early years, GM crops often produced higher yields compared to traditional crops.
Here are some differences between GM and non-GM foods:
Carrots: Non-GM carrots tend to have an uneven surface, are usually not straight, and have a protruding head. GM carrots, on the other hand, are smoother, straighter, and sometimes have a thicker tail. They are commonly found in summer, while non-GM ones are more prevalent in autumn and winter.
Potatoes: Non-GM potatoes are often rough, dark in color, and have irregular skin. After peeling, they darken quickly. GM potatoes are smoother, lighter in color, and do not change color as rapidly after peeling.
Papaya: Most papayas sold in markets today are genetically modified.
Tomatoes: GM tomatoes are bright red, firm, and less likely to crack. Small tomatoes, which come in red, yellow, oval, or round shapes, are often genetically modified. Non-GM tomatoes are larger and may have a more varied shape. They also tend to be sour and soften when fully ripe, while GM tomatoes remain hard and last longer without spoiling.
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