While delicacies are tasty, they are not necessarily healthy. Although healthy foods are nutritious, they are not harmless in any quantity. Healthy foods like nuts, fish, leafy greens, or whole grains should not be eaten in excess, otherwise they become detrimental to your health. With any food, moderation is key to enjoying its benefits.
7 Healthy Foods That Can Be Toxic If Eaten In Excess
Spinach
Spinach is a nutrient-rich vegetable, known as the "king of vegetables." It is very high in beta-carotene and an excellent source of folic acid, iron, potassium, and magnesium. Due to its high iron content, many people consider it a great food for supplementing iron. However, eating too much spinach not only fails to supplement iron but may also lead to adverse consequences.
The human body's absorption and utilization of iron from food does not depend on the iron content of the food, but rather on its chemical form. Only iron that dissolves in the intestine can be absorbed and utilized by the body. The iron in spinach is not easily absorbed by the small intestine; most of it easily combines with oxalic acid to form precipitates, affecting kidney health.
Furthermore, spinach can interfere with the absorption of zinc and also affect calcium absorption. Therefore, pregnant women and children should not eat too much of it.
Beets
Beets are rich in potassium, phosphorus, and easily digestible sugars, and can provide the body with various amino acids. Additionally, they have multiple benefits, including promoting intestinal peristalsis, aiding digestion, eliminating toxins from the body, expelling waste, promoting fat metabolism, and lowering blood pressure.
However, beets contain a large amount of sugar, so diabetics should consume them with caution. Moreover, beets contain a significant amount of dietary nitrates. If cooked and left for too long, or pickled for an extended period, these nitrates can be converted into nitrites. Consuming excessive amounts can lead to poisoning. For individuals with digestive disorders or low stomach acid, even fresh beets can cause poisoning leading to enterogenous cyanosis.
Red Meat
Red meat typically refers to meat that is red before cooking, such as pork, beef, and lamb. It is rich in minerals, especially iron and zinc, which are easily absorbed and utilized by the body. It is also a good source of protein, vitamins B1, B2, A, and D. It can be eaten in moderation, but excessive consumption is not good for your health.
Compared to white meat, red meat contains more fat, and a higher proportion of saturated fatty acids, which is not conducive to preventing cardiovascular diseases, being overweight, or obesity. People who eat a lot of red meat have a higher risk of certain diseases, so its intake should be reduced.
Oysters
Oysters are the richest source of zinc among all foods. Every 100g of oyster, excluding the shell, contains 87.1% water and 71.22mg of zinc, making it an excellent food for zinc supplementation. Additionally, they have other benefits such as purifying blood, strengthening the liver and detoxifying, and enhancing sexual function.
It should be noted that oysters are a type of shellfish that is easily contaminated by toxins. Eating too many can easily lead to illness or poisoning in humans. Furthermore, excessive consumption of oysters can increase acidic and purine substances in the body, making one prone to gout and kidney disease. It is also not advisable to eat them with beer.
Brown Rice
Brown rice is a synonym for healthy food. Eating brown rice is especially beneficial for diabetics and the obese. Because its carbohydrates are wrapped in coarse fiber, the body digests and absorbs them more slowly, which helps to control blood sugar well. At the same time, the trace elements in brown rice help improve insulin sensitivity, which is very helpful for people with impaired glucose tolerance.
Although brown rice is good, nutrition experts do not recommend eating too much of it. Because brown rice contains inorganic arsenic, a semi-metallic element that is harmful and has no benefits to the human body, and is a carcinogen. The "safety standard" set by the World Health Organization is: for a person weighing 60kg, the daily intake should not exceed 0.12mg (equivalent to eating about half a kilogram of brown rice per day).
Brown rice can also be eaten in moderation. As long as it is not eaten as a staple food, occasional consumption is not a problem.
Brazil Nuts
Due to their excellent taste and rich nutrition, Brazil nuts are known as the "king of nuts." They contain 14% protein, 11% carbohydrates, and 67% fat. Among nut foods, the Brazil nut has the highest saturated fat content, even higher than macadamia nuts.
In addition, Brazil nuts are rich in selenium, magnesium, vitamins B1, B2, E, carotene, etc. Their calcium, phosphorus, and iron content are also higher than other nuts. Brazil nuts are the plant currently known to be the richest in organic selenium, containing 1917 micrograms per 100g.
The recommended daily selenium intake for Chinese people is 60 micrograms, and it is best not to exceed 400 micrograms per day. Eating 1-2 Brazil nuts a day is enough to supplement selenium, and you don't have to worry about the effects of radioactive substances at all. Moreover, it has multiple effects such as enhancing brain memory, promoting the synthesis of glutathione, and protecting the liver from alcohol.
If you eat a large amount of Brazil nuts at once, excessive selenium intake can lead to selenium poisoning. Symptoms of acute selenium poisoning include vomiting, abdominal pain, garlic-like breath, hair and nail loss, rash, peripheral neuritis, and in severe cases, respiratory disorders and respiratory failure.
According to acute toxicity classification, selenium is highly toxic. Therefore, even though Brazil nuts are rich in nutrition, they should be eaten in moderation.
Canned Tuna
The main types of tuna processed for canned goods are albacore and yellowfin tuna. Varieties include tuna in natural juices, spiced tuna, tuna in oil, and tuna in tomato sauce, etc. Due to their low price, convenience, and being rich in protein and very important omega-3 fatty acids, they are very popular with customers.
However, canned tuna also has a major drawback—it contains mercury. Analysis data from the U.S. Food and Drug Administration (FDA) shows that, generally, the mercury content in most canned light tuna is only one-third of that in albacore tuna. However, tests on products sold on the market have found that 6% of canned light tuna has the same mercury content as albacore tuna, and some even have twice as much.
Occasionally eating high-mercury tuna once will not cause significant harm to the human body, but pregnant women should consume it with caution to avoid affecting the development of the fetus. Even for other healthy individuals, the amount must be controlled, because if it exceeds the acceptable range for the body, mercury poisoning becomes a serious problem.
In general, supplementing nutrition depends on our body's needs. If the body does not lack anything, forcing supplements can damage health. When it comes to eating and drinking, moderation is key. Don't let healthy foods become harmful to your health.