Why can't Grain Rain eat sweet potatoes?

In Grain Rain season, the temperature rises, the humidity increases, and the sweet potatoes are mildewed. In the daily diet, the sweet potato grown in Grain Rain can't be eaten in Grain Rain season. The temperature rises, the humidity increases, and the sweet potato has mold. Mold can produce toxins, which may lead to food poisoning or other health problems in severe cases. Sweet potato will absorb heavy metals and other substances in the soil during its growth, so the planting environment is not good and the soil is polluted. Sweet potato may contain excessive heavy metals and other substances, which may cause potential harm to human health. Pay attention to the source and quality when buying sweet potatoes.