1. Pineapple
Issue: Some people may experience nausea, vomiting, abdominal pain, diarrhea, tingling lips, and itchy skin after eating pineapple.
Cause: This is because pineapple contains bromelain and other allergens. To prevent allergic reactions, pineapple slices must be soaked in light salt water for more than ten minutes before eating...
Nutritionist: Pineapple is a tropical fruit rich in dietary fiber and bromelain, which is beneficial for preventing constipation and indigestion, making it a great choice for summer fruit. As the weather gradually warms up, we see more vendors selling pineapples, many of whom soak them in glass containers filled with salt water, with a chopstick stuck in each piece. Here’s a reminder: when buying, consider how long the salt water in the glass container has been sitting, and whether the chopsticks are new. This not only affects hygiene but can also cause secondary contamination.
2. Banana
Issue: To make banana peels look bright yellow, some unscrupulous vendors use excessive sulfur dioxide to ripen them, but the flesh remains hard and not sweet. Sulfur dioxide is harmful to human health.
Tip: The correct method should be to ripen them by heating.
Nutritionist: Bananas are a nutrient-rich tropical fruit, sweet in taste and cool in nature, helping to moisten the intestines and clear heat. Their proper ripening season is in the summer.

Fruit
3. Grapes
Issue: Some unscrupulous vendors and fruit farmers dilute ethylene ripening agent with water and soak immature green grapes in the diluted solution. After one or two days, the green grapes turn purple.
Nutritionist: The months of August and September are the grape ripening season. Grapes are mildly sweet and sour, neutral in nature, and help enrich blood, strengthen bones, and promote urination. They have a high sugar content, so diabetics should consume them sparingly.
4. Strawberries
Benefits: Traditional Chinese medicine believes that strawberries can reduce internal heat, relieve summer heat, and clear away heat. In spring, people often have excessive liver fire, and eating strawberries can help suppress it. Additionally, it's best to eat strawberries after meals because they contain large amounts of pectin and fiber, which can promote gastrointestinal movement, aid digestion, improve constipation, and help prevent hemorrhoids and colon cancer.
Issue: Strawberries that are hollow in the middle, irregularly shaped, or overly large are usually the result of excessive hormone use, with only a very small portion being new high-yield varieties. When treated with ripening agents or other hormone medications, their growth cycle shortens, the color becomes brighter, but their natural fragrance is diluted, resulting in a less fresh taste.
Nutritionist: Strawberries are a very appealing fruit with high vitamin C content. Eating fresh strawberries is a good choice. The natural ripening period of strawberries is in late May each year.
5. Sugarcane
Issue: Most sugarcane in spring is from autumn stockpiles. After being stored through the winter, it is prone to spoilage, with fluffy white or downy substances appearing at the ends. Once cut open, reddish thread-like substances can be seen in the cross-section.
Hazard: Some people buy sugarcane without carefully inspecting it and, upon seeing the red threads after cutting, assume it’s normal—only to suffer from sugarcane poisoning after consumption.
Nutritionist: Sugarcane is an excellent “heat-clearing” food, sweet in taste and cold in nature, with benefits such as clearing heat, promoting body fluids, soothing qi, moistening dryness, and harmonizing the stomach. The ripening season for sugarcane is November. Improper storage can lead to mold, and unripe sugarcane cut down early can also become moldy.

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