In this technologically advanced era, we can still enjoy fresh green vegetables and summer fruits during the winter. Pregnant women all know that eating more fruits is beneficial for the baby's health, but nutritionists suggest that it's best to eat the cheapest seasonal fruits in winter. This is because off-season fruits not only have low nutritional value but are also not suitable for frequent consumption.
The value of off-season fruits compared to seasonal ones lies in the novelty of eating them, not in their nutrition. Those colorful, bright, and tempting off-season fruits are often grown in greenhouses, lacking the proper sunlight, wind, and soil conditions that seasonal fruits have. Therefore, the most nutritious fruits are the cheapest varieties, and the cheapest fruits are often the seasonal ones.
It's best to buy only as much fruit as you can eat, as each fruit has its own optimal storage temperature and shelf life. The longer it's stored, the more the fruit's nutritional value and flavor will diminish. Most fruits should be stored in the refrigerator without washing first, as washing can easily lead to spoilage and rot. They should also be consumed within a week. However, fruits like bananas, pineapples, mangoes, papayas, and lemons should be stored in a cool, dark corner indoors and are not suitable for long-term refrigeration.
Additionally, some unscrupulous vendors use chemical agents to ripen off-season fruits to sell their products, which can harm human health. Below are several examples of dangerous off-season fruits.
1. Grapes
Some unscrupulous vendors and farmers use a ripening agent—etaphon. Users dilute etaphon with water, soak unripe green grapes in the solution, and within a day or two, the green grapes turn purple. Although this chemical has low toxicity, long-term consumption is harmful to human health.
2. Bananas
To make banana skins appear tender and yellow, some unscrupulous vendors use sulfur dioxide to ripen them. However, the flesh remains hard and not sweet at all. Sulfur dioxide and its derivatives are not only harmful to the human respiratory system but can also cause damage to the brain, liver, spleen, and kidneys, and even pose risks to the reproductive system.
3. Watermelons
Excessive use of ripening agents, expanders, and highly toxic pesticides can make watermelons toxic. Such watermelons have uneven stripes on their rind. When cut open, the flesh is exceptionally bright red, but the seeds are white, and there is an unusual aftertaste in the mouth.
4. Strawberries
Large, irregularly shaped strawberries with a hollow center are generally caused by excessive hormones. After being treated with ripening agents or other hormones, strawberries have a shorter growth period, their color becomes fresh, but their flavor becomes bland. This type of strawberry should be consumed with caution. Eating large quantities can affect normal human development, such as causing premature development in children.
Recommendations for buying off-season vegetables:
1. Some vegetables may still show signs of being unripe, such as a greenish tint on the skin or other parts. Be vigilant when purchasing. You can remove residual toxins by exposing them to light, peeling them, blanching them in boiling water, or stir-frying them thoroughly before eating.
2. If you can't resist the temptation of a wide variety of off-season vegetables in winter, it's best to choose options like onions, carrots, and eggplants, which have fewer pesticide residues. Try to avoid buying vegetables with strange shapes or colors.
3. Try to buy fresh ingredients from the market and cook them yourself, rather than purchasing pre-made products. Pre-made foods often undergo repeated processing, which can easily destroy their nutritional value. It's also difficult to ensure their freshness, and they may even contain harmful additives.
Recommendations for what vegetables to eat in winter:
As green leafy vegetables are relatively scarce in winter, what vegetables should you eat? Winter is suitable for eating some tubers, such as sweet potatoes and potatoes. They are rich in vitamin C, vitamin B, and red-fleshed sweet potatoes, in particular, contain more carotene.
Among the common vegetables available in winter, in addition to Chinese cabbage, you should also choose options like cabbage, radishes (both red and white), carrots, soybean sprouts, mung bean sprouts, and rape. These vegetables are all rich in vitamins. By frequently rotating varieties and combining them reasonably, you can meet the body's vitamin needs.
Different types of vegetables are rich in different nutrients. It is recommended to eat vegetables daily, and ideally several times a week. To choose what vegetables to eat in winter, select from five categories: dark green, orange, beans, starchy vegetables, and other vegetables. By frequently changing the types and ensuring a diverse selection, you can fully absorb the different nutrients from various foods.