Your body has a system for processing waste.
The lymphatic system is responsible for removing metabolic waste and excess fluid from all tissues in the body. But for a long time, scientists have been puzzled: what about the brain?
The brain is the most metabolically active organ in the body, producing a large amount of metabolic waste every day. But strangely, the brain lacks traditional lymphatic vessels. So, how does the brain clean itself?
This puzzle wasn't solved until 2012. And this answer opened up a whole new field of neuroscience, giving us a completely new understanding of the relationship between "sleep," "exercise," and "brain health."
The brain's cleaning system: the colloid lymphatic system
In 2012, scientists discovered a brain-specific cleaning system, which they named the "glymphatic system".
Its operation is ingenious. Clean cerebrospinal fluid flows into the brain tissue along the space around the blood vessels in the brain, where it exchanges and mixes with tissue fluid full of metabolic waste. Then, the waste is flushed out and carried to the body's lymphatic system for cleansing.
Simply put, this is the brain's process of "bathing" itself. It flushes out and removes metabolic waste accumulated throughout the day, including some toxic proteins associated with neurodegenerative diseases (such as amyloid proteins associated with Alzheimer's).
Why is this system important? Because research has found that when the lymphatic system malfunctions, these toxic proteins accumulate, and this accumulation is closely related to the development of neurodegenerative diseases such as Alzheimer's.
In other words, whether the brain can properly "bathe" is related to its long-term health.
Key finding: It is most active while sleeping.
One of the most important characteristics of the lymphatic system is that its activity level changes depending on your state. It is most active when you are asleep, especially during deep slow-wave sleep.
The reason is that the space between brain cells expands during sleep, making it easier for cerebrospinal fluid to flow and flush out. In other words, sleep is not just about resting the brain; it is actually the golden period for the brain to perform a deep cleansing.
This explains many things. Why chronic sleep deprivation affects cognitive function. Why sleep disorders are considered a risk factor for neurodegenerative diseases. Because when you deprive your brain of sleep, you also deprive it of the opportunity to cleanse itself, and waste accumulates day by day.
A good night's sleep, in a sense, is like giving the brain a thorough and deep clean.
What about exercise? Exercise can also help "cleanse" the brain.
This brings us to an exciting research direction that has emerged in recent years.
Scientists began to ask: Besides sleep, what else can promote the function of the lymphatic system? Exercise became the most prominent answer.
A 2025 review of exercise and colloid function indicates that increasing evidence shows that physical exercise can enhance colloid function and promote brain waste removal, making it a promising non-drug way to protect the brain.
The mechanisms by which exercise helps cleanse the brain are multifaceted.
First, there's the pulsation of blood vessels. Studies have found that the flow of cerebrospinal fluid is largely driven by the pulsation of arteries. Exercise can improve cerebral blood flow and enhance the elasticity and pulsation of blood vessels, which directly creates better conditions for the flow of cerebrospinal fluid.
Secondly, it helps indirectly. Exercise improves sleep quality, and sleep is when the lymphatic system is most active. Therefore, exercise improves sleep, which indirectly strengthens the brain's cleansing process. Exercise can also reduce inflammation, which helps maintain the environment in which this brain cleansing system functions.
Of course, this field is still very new. Researchers have also honestly pointed out that research on exercise and the lymphatic system is still in its very early stages, and many details, such as the most suitable types and intensities of exercise, require further research to clarify. However, the evidence accumulated so far is enough for us to take the idea that "exercise is beneficial for brain cleansing" seriously.
What role might Chanrou play in this matter?
First, let me be honest: there are currently no experiments directly studying Chanrou and the lymphatic system. Therefore, what follows is an inference about its potential benefits based on the known operating principles of the lymphatic system and several known characteristics of Chanrou, rather than any proven claims.
From this perspective, Chanrou possesses several qualities that perfectly align with the conditions favored by the lymphatic system.
It promotes circulation and vascular pulsation.
The flow of the lymphatic system depends on good circulation and vascular pulsation. The integration of gentle, rhythmic movements, fluidity, and respiration naturally promotes blood circulation throughout the body. Good circulation is the fundamental environment for this cleansing system to function.
It may improve sleep quality.
As mentioned earlier, sleep is the most active period for the colloid lymphatic system, and exercise can indirectly help it by improving sleep. In fact, a Taiwanese study we discussed earlier found that Gyrokinesics can improve the subjective experience of sleep in people with poor sleep. If Gyrokinesics can help you sleep better, then it indirectly creates better conditions for deep brain cleansing.
Its deep breathing stimulates the flow of cerebrospinal fluid.
Studies show that breathing is one of the factors driving the flow of cerebrospinal fluid. Chanrou highly values deep, rhythmic breathing, as the pressure changes in the thoracic and abdominal cavities caused by this breathing theoretically help with the flow of body fluids.
It regulates the nervous system and helps the body enter a repair state.
The lymphatic system prefers a state of relaxation and repair dominated by the parasympathetic nervous system. Chanrou's regulation of the nervous system helps the body switch from tension to repair. When your nervous system is truly relaxed, your body has the capacity to perform these deep self-cleaning and repair processes.
Take care of your brain, start by taking care of your whole life.
The discovery of the colloid lymphatic system has given us a very important insight.
Brain health is not an isolated matter. It's connected to how well you sleep, how much exercise you get, how smoothly your circulation works, and how relaxed your nervous system is. Those seemingly unrelated lifestyle habits actually subtly influence whether your brain can effectively cleanse itself each day.
This echoes Chanrou's long-held view that the body is a whole. Taking care of sleep, circulation, breathing, and the balance of the nervous system—all of these together nourish the entire mind and body, including the brain that works silently for you every day, hidden in the skull.
We are still in the early stages of exploring this field, and many answers are not yet fully clear. But one thing is clear: a body that sleeps well, moves enough, has good circulation, and knows how to relax is the best caregiver for the brain.
Sleep well, move well, breathe well.
Perhaps this is the gentlest preparation you can make for every deep cleansing of your brain.
