Your Brain Has Its Own Cleaning System.
Here’s How to Keep It Working
Did you know your brain has its own waste-removal system, and some of your everyday habits might help it work more effectively?
We spend plenty of time thinking about keeping our bodies healthy. We exercise to strengthen our muscles, eat well to support our heart and take care of our joints and spine. But what about looking after the health of our brain?
Scientists have been investigating a fascinating process called the glymphatic system, which helps the brain clear away waste products. Understanding this system might provide new insights into maintaining brain health as we age.
And the encouraging news? Some of the best ways to support your brain are already familiar to us.
Meet Your Brain’s Cleaning Crew
Your brain is an incredibly busy organ. Even when you're relaxing, billions of nerve cells are communicating, processing information and using energy.
All this activity produces metabolic waste.
The glymphatic system helps remove some of this waste by moving cerebrospinal fluid (CSF) through spaces surrounding blood vessels and exchanging fluid with the tissues of the brain.
Think of it as part of your brain's housekeeping service.
Researchers are particularly interested in its role in clearing proteins such as beta-amyloid, which is associated with Alzheimer's disease.
Although we are still learning how this system works in humans, scientists believe impaired waste clearance might contribute to age-related neurological conditions.
So what helps keep this system functioning?
1. Sleep: Your Brain's Most Important Housekeeping Time
If there is one habit worth prioritising, it's getting a good night's sleep. Research in animals suggests glymphatic clearance becomes more active during sleep, helping remove waste products accumulated during waking hours. Human research also links poor sleep with changes in brain waste clearance and a greater risk of cognitive decline.
What should you aim for?
Get around 7 to 9 hours of sleep each night, adjusting for your individual needs.
Maintain consistent bedtimes and waking times.
Keep your bedroom cool, dark and quiet.
Reduce alcohol consumption, particularly close to bedtime.
Seek advice if you snore heavily or suspect sleep apnoea.
Interestingly, researchers have also found that sleeping on your side improves glymphatic clearance in mice compared with sleeping on the back or stomach.
Whether this applies to humans remains uncertain, so there is no need to change your preferred sleeping position solely for brain health.
2. Exercise: Good for Your Body, Good for Your Brain
We already know regular physical activity benefits cardiovascular health, muscle strength, balance and mental wellbeing. Now researchers are investigating another potential benefit: improved brain waste clearance.
A small human study described in New Scientist found improvements in an imaging measure associated with glymphatic drainage after 12 weeks of regular cycling. A single exercise session did not produce the same result.
Animal studies have also reported improvements in glymphatic function following regular exercise. Although these findings are preliminary, they reinforce the value of consistent physical activity.
Your brain-friendly exercise prescription:
Aim for 150 to 300 minutes of moderate aerobic activity each week.
Include strength training at least twice weekly.
Break up prolonged sitting with regular movement.
Choose activities you enjoy, such as brisk walking, swimming, cycling, running or gym training.
The key appears to be consistency rather than occasional bursts of exercise.
3. Breathing: An Interesting New Area of Research
Here's something you might find surprising.
The way we breathe influences pressure changes within the chest and circulation of cerebrospinal fluid.
Researchers have demonstrated that breathing patterns, particularly deeper diaphragmatic breathing, affect CSF movement. This has generated interest in whether slow, controlled breathing might support the brain's natural waste-removal processes. However, increasing CSF movement is not the same as proving improved waste clearance or protection against dementia.
Nevertheless, slow breathing is a useful practice for relaxation and stress management.
Try this simple breathing exercise:
Sit comfortably or lie on your back.
Breathe gently through your nose, allowing your abdomen to expand.
Exhale slowly and comfortably.
Continue for 3 to 5 minutes without forcing your breathing.
Try incorporating this into your evening routine.
4. Could Neck Movement Help?
This is an especially interesting area of emerging neuroscience.
Researchers have identified lymphatic vessels around the brain and neck involved in draining fluid from the central nervous system. In a recent animal study, gentle massage along the face and neck increased cerebrospinal fluid drainage. It's an intriguing finding, particularly given the close anatomical relationship between the head, neck and lymphatic drainage pathways.
What we do know is that maintaining comfortable neck movement, physical activity and good sleep habits supports general wellbeing. For people experiencing neck pain or stiffness, appropriate chiropractic care and exercise might help improve comfort and function. Whether these benefits influence brain waste clearance remains an open research question.
5. Your Daily Habits Matter More Than Any Detox
Despite the popularity of detox diets, supplements and cleansing programs, there is no convincing evidence that special detox products improve the brain's glymphatic system.
Your brain already has sophisticated mechanisms for maintaining its internal environment.
Rather than searching for a quick fix, focus on the habits with established health benefits.
Regular exercise, adequate sleep, nutritious food, cardiovascular health and avoiding smoking all contribute to healthier ageing. And while scientists continue exploring the glymphatic system, these habits remain some of our strongest tools for protecting long-term brain health.
The Take-Home Message
The discovery of the glymphatic system has opened an exciting new chapter in our understanding of the brain. Researchers are beginning to explore how sleep, movement, breathing and fluid drainage influence the brain's ability to remove metabolic waste. There is still much to learn, particularly about whether improving glymphatic clearance reduces the risk of Alzheimer's disease or other neurological conditions.
But one message is already clear.
Looking after your brain starts with looking after your whole body.
Sleep well. Move regularly. Stay strong. Manage your cardiovascular health. And make time to relax.
Your brain has plenty of work to do. Give it the best conditions to do its job.
At Lane Cove Chiropractic Centre
We believe healthy ageing involves maintaining mobility, strength, balance and an active lifestyle.
If neck or spinal discomfort is affecting your sleep, exercise or daily activities, speak with us about ways to improve your comfort and movement.
Because staying active and moving well matters at every age.
Dr Mark has a special interest in helping recreational athletes of all ages perform better and prevent injury. Correct breathing and postural alignment are critical for top performance and injury prevention and is an integral part of “The Over 40 Athlete System” that Mark has developed.
Dr Julie has a special interest in helping mothers and “mothers to be”. Her Post Graduate qualifications in Paediatric Chiropractic and as an ex-midwife give her a unique ability to help pregnant women, new mums and their young children.
Yours in Health,
Dr's Mark & Julie
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