6 foods that the kidneys are afraid of. Many people eat them almost every day

Many friends have kidney problems. If you want to avoid kidney function problems, you must pay more attention to your diet in life. So what are the 6 foods that the kidneys are most afraid of? PHP editor Xiaoxin brings to you: 6 kinds of foods that the kidneys are most afraid of. Many people eat them almost every day. Let’s see how many of them you get? I believe this article will bring you some help.

The kidney is a very important "filter" in our body and one of the important organs for expelling body waste. If there is a problem with it, our body will also experience a series of symptoms, which can be life-threatening in severe cases.

If you want to protect your kidneys, you must try to stay away from foods that are not friendly to the kidneys, and at the same time get rid of some bad habits that damage the kidneys.

These 6 foods are not friendly to the kidneys

1. High-salt foods

The salt we consume in our diet is mainly metabolized by the kidneys. If you usually have strong taste and eat a lot of salt, it will inevitably aggravate the condition. Metabolic burden on the kidneys.

A high-salt diet can damage the kidneys in many ways. On the one hand, TGF-β1 is a key factor that promotes renal fibrosis. Eating too much salt will increase its production and accelerate renal sclerosis and fibrosis by enhancing its signal transduction. On the other hand, high-salt diet can cause Oxidative stress in the kidneys can cause renal failure and renal structural remodeling, damaging the kidneys; in addition, high-salt intake increases urinary protein, and long-term high-salt diet destroys the selective permeability of the glomerular basement membrane, which will promote Kidney disease progresses, and salt restriction can significantly reduce urinary protein.

On the other hand, long-term high-salt diet will increase the risk of high blood pressure, which will also affect the normal function of the kidneys.

What should we do: According to the recommendations of the "Dietary Guidelines for Chinese Residents (2022)", the daily salt intake per person should be controlled within 5 grams, which is approximately no more than 1 beer bottle cap (with rubber pad). At the same time, you should also eat less food containing invisible salt such as sauce, fermented bean curd, pickles, sausage, ham, instant noodles, spicy strips, etc. You can use onion, ginger, garlic, vinegar and other condiments appropriately when cooking.

2. High-sugar foods

High-sugar diets will not only increase the risk of obesity and high blood pressure, but also increase the risk of type 2 diabetes, thereby endangering kidney health.

What should we do: The "Dietary Guidelines for Chinese Residents (2022)" recommends that our daily sugar intake should be controlled within 50 grams, preferably no more than 25 grams. At the same time, you should also reduce the intake of sweet drinks and carbonated drinks, and drink less or no fruit juice.

Picture: 1 mineral water bottle cap contains about 5 grams of white sugar (photographed by the author)

Picture: 1 tablespoon contains about 10 grams of white sugar (photographed by the author)

3. High oxalate foods

Calcium oxalate Stones are a common type of kidney stones and urinary stones. The combination of oxalic acid and calcium will form calcium oxalate crystals. Under normal circumstances, urine contains some substances that can inhibit the formation and growth of crystals. For example, mucin and citric acid can inhibit the formation of calcium oxalate crystals.

But when the oxalic acid content in the urine is too high, the urine may be in a supersaturated state, causing calcium oxalate crystals to precipitate and combine together, eventually forming stones.

What should we do: For foods with high oxalic acid content, be sure to blanch them to remove most of the oxalic acid before eating, such as spinach, amaranth, water spinach, wild rice, winter bamboo shoots, etc.

4. Star fruit

Although star fruit is delicious, it not only has high oxalic acid content, but also contains a neurotoxin that needs to be excreted from the body through the kidneys. Healthy people with normal kidney function can excrete this neurotoxin through urine, so they don’t have to worry about eating one or two star fruit.

But for people with poor kidney function, it is best to eat less or not at all, otherwise symptoms such as nausea, vomiting, abdominal pain, diarrhea, back pain and acute kidney injury may occur. Literature data mentions that the mortality rate of carambola poisoning in patients with abnormal renal function can be as high as 20% to 40%.

5. Alcohol

Alcohol may damage the kidneys through various mechanisms, such as inducing the production of reactive oxygen species, leading to oxidative stress, excessive free radicals, which in turn damages tissue and increases inflammation. In addition, the effects of excessive alcohol intake on the liver, heart, intestines, and skeletal muscles will also synergistically increase the pathological damage to the kidneys.

Some literature also mentioned that long-term drinking will not only aggravate the formation of calcium oxalate crystals in the body, but also affect purine metabolism and increase the incidence of kidney stones.

What we should do: drink less or no alcohol. Children, adolescents, pregnant women, and wet nurses should not drink alcohol. Adults should limit their alcohol intake to no more than 15 grams per day, which is equivalent to the amount of alcohol consumed in the picture below.

Picture: "Dietary Guidelines for Chinese Residents (2022)"

6, old soup, hot pot soup

There are always people who think that old soup is very tonic and hot pot soup is nutritious. In fact, it is not recommended to drink either of them. Both of them have been stewed for a long time. The soup contains high purine, which will increase the excretion of uric acid. Drinking it frequently can easily form uric acid stones.

In addition, people with impaired kidney function should avoid high-protein diets, especially high-animal protein, otherwise they may increase the burden on the kidneys.

5 bad habits that may damage the kidneys

1. Don’t like to drink water

Drinking enough water helps the kidneys to excrete waste from the body. If you drink too little water, your urine will Becomes concentrated, increasing the risk of urinary stone formation. Drinking enough water can reduce the risk of initial onset and recurrence of urinary tract stones.

It is recommended that women and men should drink at least 1500ml and 1700ml of water per day respectively, drink slowly in small sips and drink water multiple times.

2. Taking medicines indiscriminately

Many medicines need to be metabolized by the kidneys after being taken. Taking medicines indiscriminately or excessively will increase the burden on the kidneys and even cause kidney damage.

3. Holding urine

Hold urine is very common in life. If you often hold urine, it will easily lead to upward reflux of urine, increase the risk of urinary tract infection and kidney infection, and also damage kidney function.

4. Staying up late

There is physiological evidence that sleep can regulate kidney function, and staying up late for a long time without getting enough sleep can damage kidney function. A study that followed more than 4,000 nurses for 11 years showed that people who slept an average of less than 5 to 6 hours a night had a significantly faster decline in kidney function than those who slept an average of 7 to 8 hours a night. Increase.

5. Smoking

Smoking not only accelerates the progression of kidney disease in patients with chronic diseases such as diabetes and hypertension, but also can lead to kidney damage and disease for healthy people without a history of chronic kidney disease. Manifested as reduced glomerular filtration rate and/or proteinuria.

To protect the quality of life, it is essential to protect the health of the kidneys.

In addition to paying attention to the kidney-unfriendly foods and bad habits that are not conducive to kidney health mentioned in the article, you must also pay attention to the intake of fresh fruits and vegetables in your diet. Fruits and vegetables are rich in dietary fiber, mineral potassium, and antioxidants. Substances, etc. can help us better protect kidney health.

References

[1] Ye Xingxing, Zhang Hongmei. Effects of dietary salt intake on chronic kidney disease and research progress on salt restriction [J]. Chinese Journal of Integrated Traditional Chinese and Western Medicine Nephrology, 2015, 16(6):557 -559

[2] Chinese Nutrition Society. Dietary Guidelines for Chinese Residents[M]. People's Medical Publishing House. 2022

[3] Niu Qingyu, Zhao Huiping. Research progress on carambola poisoning in patients with chronic kidney disease[J]. Chinese Blood Purification , 2018, 17(6): 407-411

[4] Zhang Lihan (review), Fu Ping (review). Pathogenesis of alcohol-induced renal injury [J]. Journal of Nephrology and Dialysis and Kidney Transplantation, 2020, 29 (4):358-362

[5] Li Ruibao, Li Bijun, Lin Weiming, Nong Yi. Analysis of the composition characteristics and risk factors of kidney stones in Zhanjiang area [J]. Chinese Folk Therapy, 2022, 30(21):85-87

[6]McMullan, Ciaran J et al. “Association of short sleep duration and rapid decline in renal function.” Kidney international vol. 89,6 (2016): 1324-30. doi:10.1016/j.kint.2015.12. 048

[7] Zhang Chun (review), An Lianqing (review), Liu Zhenjiang (review), Chen Junhua (review), Cai Guangyan (review). Research progress on smoking and related chronic kidney disease in military personnel [J]. Armed Police Medicine, 2023, 34(8): 715-718

[8] Xie Wengui, Xi Qilin. Research progress on the prevention of kidney stone formation by tea [J]. Journal of Clinical Urology, 2021, 36(01): 76-82 .DOI:10.13201/j.issn.1001-1420.2021.01.017.

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