We all know the many benefits of eating vegetables and must consume them daily to maintain a balanced diet. However, you might not be aware that vegetables also have their taboos; not every part of every vegetable is edible. Let's take a look at which vegetables have inedible parts, so be careful not to eat the wrong parts.
1. Bell Peppers: The Stem
To prevent pests and diseases, most vegetables are sprayed with pesticides. For bell peppers, although they grow on a vine, the plant is relatively short. When pesticides are applied, they are often sprayed from top to bottom, causing them to accumulate in large amounts at the stem of the pepper.
2. Chinese Cabbage: The Leaf Base
The leaf base and stem of Chinese cabbage can be said to have the most pesticide residues. When pesticides are sprayed, they run down the leaves and stalks, accumulating at the base of the leaves. Furthermore, because the leaf base is close to the ground, wind and sun exposure have less of a chance to reduce or break down the pesticides, making the residue more persistent.
3. Potatoes: The Skin
Potatoes contain solanine (also known as solanine glycoside), a weakly alkaline glycoside. This toxic substance is almost entirely concentrated in the potato skin, especially in skins that have turned green from sun exposure or where the potato has sprouted. When solanine accumulates to a certain level in the body, it can cause chronic poisoning.
4. Green Beans: The Ends and Sides
If not removed or cooked thoroughly, green beans can easily cause adverse reactions such as nausea, vomiting, diarrhea, and dizziness. Toxins are actually higher in green beans cooked to 80°C that are not fully cooked. Therefore, the best way to eat green beans is to snap off both ends and boil them over high heat. Make sure the beans are submerged in water and boil for another 30 minutes after the water comes to a boil.
5. Fresh Daylilies: The Root
Fresh daylilies, also known as fresh golden needles, have colchicine mainly in their roots. Once in the human body, colchicine is oxidized to produce toxic colchicine oxide, which disrupts cell division, causes cell death, and leads to symptoms similar to acute gastroenteritis, such as gastrointestinal discomfort, abdominal pain, vomiting, and diarrhea. This condition is easily misdiagnosed.
6. Bok Choy: The Root
Due to gravity when pesticides are sprayed, they run down the leaves and stalks and collect at the base of the vegetable, near the root.
7. Sweet Potatoes: The Skin
The skin of sweet potatoes has a very high content of anti-cancer components. However, because they grow underground, the skin is in direct contact with the soil, causing many harmful substances to accumulate in it. Sweet potatoes are also susceptible to black spot disease, which appears as brown to dark brown spots on the skin. To eat vegetables healthily, you must eat them correctly.
8. Rootless Bean Sprouts
Many families like to choose bean sprouts without roots, with thick, short stems and small buds, believing they are tender, crispy, less wasteful, and quick to cook. However, experts warn that these bean sprouts are highly toxic, have certain carcinogenic properties, and pose a significant risk to health.
When people eat bean sprouts grown and stimulated with herbicides, the various chemical toxins in them will inhibit the growth of human cells and damage tissues. If you often eat bean sprouts with high concentrations of herbicides, it can also inhibit the growth of various cells in the body or cause tissue degeneration, leading to mutations in some cells that gradually develop into cancer cells. Additionally, it can cause chronic poisoning in certain tissues, leading to metabolic disorders. Therefore, rootless bean sprouts should not be eaten.
9. Chives: Leaves Containing Copper Sulfate
Recently, news about Nanjing vegetable vendors spraying copper sulfate on chives to preserve them has drawn attention. Copper sulfate, also known as blue vitriol, is used to treat leafy vegetables like chives to make their color bright and fresh, preventing them from wilting. However, when copper sulfate seeps into the leaves, it is highly irritating to the gastrointestinal tract. Consuming too much at once can cause symptoms such as vomiting, diarrhea, black stool, leading to acute gastroenteritis, jaundice, and in severe cases, renal failure or even death.
Therefore, when purchasing, pay attention to the fact that normal chives have a dull, grassy green color and are straight and full. Chives treated with copper sulfate look as if they have been waxed, unusually bright and vibrant, and may have faint blue spots.
10. Tomatoes: Green Tomatoes Contain Tomatine
Tomatoes are richest in lycopene, which has antioxidant, anti-radiation, anti-aging, immunity-boosting, and prostate cancer-reducing effects. However, it should be noted that green tomatoes are not fully ripe, so they cannot provide the benefits of lycopene and have poor nutritional value. Furthermore, the tomatine they contain is significantly more toxic. If a person consumes a large amount of tomatine in a short period, they may experience symptoms of poisoning. Therefore, it is recommended to choose fresh, red, and naturally ripe tomatoes. If the base of some tomatoes is green, it is best to remove it before eating.