Is too much coffee bad for the kidneys?

In this brief text we will answer the question: “is too much coffee bad for the kidneys?”. In addition, we will bring some associations between moderate consumption of coffee and benefits for the kidneys. Finally, we will discuss the exaggerated consumption of coffee and caffeine,as well as the health risks associated with it.

Is too much coffee bad for the kidneys?

No, drinking a lot of coffee is not bad for a healthy person’s kidneys. However, consumption in high doses of coffee can harm the kidneys of people with kidney problems. In addition, excessive consumption of coffee brings risks of side effects such as anxiety, irritability, insomnia, intestinal discomfort and headache.

Coffee acts as a diuretic within the human body. This means that the drink stimulates the kidneys to eliminate more fluid, making the person who consumes the drink need to go to the bathroom more often.

This is because caffeine interferes with the way fluid is reabsorbed into the blood. But it is not necessarily a problem for people who have normal kidney function.

On the other hand, studies show that long-term consumption of coffee is bad for the kidneys of those who already have kidney disease.

For those who already suffer from some type of condition that affects the kidneys, the ideal is to talk to the doctor who takes care of the case to find out if you can consume coffee and in what amount and frequency.

For those who do not suffer from this type of problem, however, want to preserve the good state of their kidneys, the key is to drink the drink in moderation. The University of Michigan, through its health service, claims that drinking one to two large cups of coffee is relatively harmless.

On the other hand, consumption in larger doses of coffee is bad for the kidneys and carries the risk of side effects such as anxiety, irritability, insomnia, intestinal discomfort and headache.

What is the relation between moderate consumption of coffee and kidney health?

Drinking up to three or four cups of caffeinated or decaf coffee a day can reduce your risk of developing and dying from chronic liver disease. In addition, moderate consumption of caffeine is associated with numerous other health benefits, such as improved concentration and focus.

Ground coffee has higher levels of kahweol and cafestol, two antioxidants found in coffee beans that, in studies, have been shown to have anti-inflammatory properties.

The caffeine in coffee, for example, is one of the major issues of kidney health. In fact, there is no scientific evidence to indicate that moderate consumption (up to 4 cups of coffee or about 80-100mg of caffeine) exerts a harmful action on the functioning of the kidneys.

Caffeine is not the villain of coffee. In this case, the problem comes from the oxalic acid present in some foods besides coffee, such as teas, tomatoes, spinach, watercress, broccoli, among others.

Oxalic acid is one of the components that give flavor to some foods and when in excess it can combine with calcium (also in excess) and form what we know as kidney stones (calcium oxalate). A stone will only form if we have an unbalanced and not properly combined diet. 

There is a protective effect of caffeine consumption in patients with chronic kidney disease: the reduction in mortality occurs even after taking into account other important factors such as age, sex, smoking, other diseases and diet. Therefore, advising patients with kidney failure to drink more caffeine may help reduce their risk of death.

What is the maximum limit of caffeine intake per day?

A consumption of more than 400mg of caffeine per day can lead to so-called “caffeinism”, whose most common symptoms are anxiety, restlessness, irritability, tremors, loss of appetite, muscle tension and heart palpitations.

Caffeine activates the alert system. If a person drinks coffee, cola or energy drinks a few hours before going to bed, they may have trouble falling asleep.

However, there are people who end up becoming conditioned or tolerant. In this case, even if it does not interfere with sleep time, caffeine interferes with its quality.

Therefore, it is always advisable to avoid the consumption of any drink that contains caffeine in its formula a few hours before bed.

Conclusion

In this brief text we answered the question: “is too much coffee bad for the kidneys?”. In addition, we brought some associations between moderate consumption of coffee and benefits for the kidneys. Finally, we discussed the exaggerated consumption of coffee and caffeine,as well as the health risks associated with it.

Citations

https://www.kidney.org/newsletter/coffee-and-kidney-disease
https://www.healthline.com/nutrition/caffeine-side-effects
https://www.verywellhealth.com/what-is-coffees-effect-on-the-kidneys-4147536
https://www.livestrong.com/article/535798-can-drinking-too-much-caffeine-affect-your-kidneys/

Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.