Kidney function
The effect of kidney functions on brain health.
The kidneys and the brain seem to have little in common at first sight. Yet, they are closely connected. Both organs rely heavily on a fine network of small blood vessels. If these vessels become damaged, it affects both the kidneys and the brain.
Research shows that people with reduced kidney function are more often troubled by cognitive decline. Therefore, chronic kidney damage is included as a risk factor within the LIBRA score for brain health.
What do we mean by reduced kidney function?
Kidney function is usually assessed with blood and urine tests. These tests look at:
- the eGFR value, a measure of how well the kidneys filter the blood
- the presence of protein in the urine
A reduced kidney function means that waste products and fluids are not properly removed. This can develop gradually and initially cause few symptoms.
Why is reduced kidney function unfavorable for your brain?
Vulnerability of Small Blood Vessels The small blood vessels in the kidneys and in the brain are very similar. Factors like high blood pressure, diabetes, and smoking damage these vessels in multiple areas simultaneously.
Accumulation of Waste Products If the kidneys do not function well, certain waste products can accumulate in the body. This can lead to fatigue, concentration problems, and reduced cognitive ability.
Correlation with Other Conditions Reduced kidney function often occurs together with high blood pressure, diabetes, and cardiovascular diseases. This combination increases the risk of brain damage.
Signal of Long-term Strain Kidney damage usually does not occur suddenly. It is often a sign that the body has been exposed to unfavorable conditions such as high blood pressure or poor blood sugar regulation for a long time.
Common Misunderstandings
“My kidneys have nothing to do with my brain” Kidneys and brain share the same vulnerable vascular system. Damage to one organ often indicates risks for the other.
“If I have no symptoms, there is no problem” A reduced kidney function often shows symptoms only at a late stage. Damage can be present before you notice anything.
“Kidney damage is inevitable with aging” Kidney function decreases slightly with age, but significant kidney damage is not a normal part of aging and deserves attention.
“There is nothing you can do about it” Although existing damage cannot always be repaired, further decline can often be slowed or prevented.
What can you do yourself?
Keep blood pressure and blood sugar under control These are the most important factors to prevent further kidney damage while simultaneously protecting the brain.
Use medication as agreed Some medications protect the kidneys and reduce the risk of further damage. Never stop these without consulting.
Be cautious with painkillers Frequent use of certain painkillers can strain the kidneys. Consult your doctor if you need them regularly.
Ensure adequate, appropriate fluid intake Drinking enough supports kidney function, unless your doctor has advised otherwise.
Get your kidney function checked Regular monitoring is important, especially if you have diabetes, high blood pressure, or cardiovascular diseases.
When additional guidance is helpful
When additional help is beneficial
Extra support is wise if:
- kidney function is further deteriorating
- multiple risk factors are present at the same time
- you have doubts about medication or lifestyle advice
The general practitioner or internist can work with you to see how further damage can be prevented as effectively as possible.
In short
A reduced kidney function is often a sign of vulnerable blood vessels, including in the brain. By paying attention to kidney health, you protect your entire vascular system and support your brain health in the long term.
Sources
The other lifestyle factors
Frequently asked questions
How does Remind help me recognise changes in my brain in time?
Remind monitors multiple aspects of your brain health over time, such as thinking, memory, speech and daily functioning. By combining these signals you get a clear picture of what is normal for you and which changes deserve attention. This provides peace of mind and prevents you from reacting too late to subtle shifts.
Is Remind the same as a medical examination or diagnosis?
No. Remind is a wellbeing product and not a medical device. The app provides insight into patterns and changes but does not replace a doctor or a diagnosis. If you have concerns about your memory or functioning, always discuss your results with your GP.
How reliable are the measurement methods Remind uses?
Remind uses methods based on validated questionnaires and digital tests that are also applied in research and clinical settings. We combine multiple sources, such as speech, memory, behaviour and lifestyle, so that you do not get a single snapshot but a complete and reliable picture that grows as you use the app.
What happens to my data? Is anyone listening or reading along?
No. Remind never stores conversations or the content of messages. All data is processed with encryption, and we only use patterns such as pace, rhythm or accuracy, not content. You always decide which data you share and with whom.
What does my Remind brain age give me?
Your Remind brain age shows how your brain is functioning compared with what is normal for your age. You receive practical advice to strengthen your brain health and can see over time whether your actions have an effect. This helps you make informed choices and stay in control.