The Brain’s Nightly Carwash 

Our brain is crucial for our existence. In fact, it is so important, it has its own night shift cleaning crew that works hard while we sleep. 

The Glymphatic System: The Brain’s Cleaning Crew 

This cleaning crew, called the glymphatic system, is your brain’s very own version of the lymphatic system. Just as our lymphatic system filters out waste and toxins, our brain uses the glymphatic system to clear out the trash from the day. The catch is… this cleaning crew can only clock in when you’re asleep. 

How the Brain Cleans Itself During Sleep 

To create the best visual, imagine a brain car wash… That’s basically what’s happening in your head every night. As you drift into deep sleep, cerebrospinal fluid rushes through your brain tissue, washing away metabolic waste like a gentle rinse cycle. This includes clearing out excess proteins such as beta-amyloid, which has been linked to Alzheimer’s. 

During the day, your brain is in high gear: solving problems, remembering appointments, dodging traffic, worrying about whether that text sounded weird… all that mental activity builds up cellular junk that needs to be cleaned out. 

The Glymphatic System & Immune Support 

A well functioning glymphatic system also helps support a healthy immune system. We often emphasize the importance of creating a healthy immune system… so you may be comforted in knowing a major immune supporter is simply a good night’s sleep! 

How Your Brain’s Rinse Cycle Helps Your Immune System 

• Waste buildup in the brain negatively affects our immune system. If your brain can’t drain properly, waste products start to irritate the immune system, leading to inflammation, brain fog, and lowered resilience to fight infection. 

• Sleep is prime time for immune defense. This means deep sleep doesn’t just clean your brain, it also enhances the memory of your immune system so that it can better protect you from future invaders. (An important feature of your immune system is its own memory, too.) 

• Ever feel extra foggy when you’re sick or stressed? That’s due to inflammatory messengers called cytokines. These little Tasmanian devils are essential for fighting infection. But they also need a ride out of town when their job is done. The glymphatic system helps clear them from your brain, keeping both your mind and immune response in balance. 

• Teamwork with the body’s lymphatic system: Your body’s lymphatic system handles immune cell circulation and waste drainage. It works hand-in-hand with the glymphatic system. This means if we can help to optimize support for one, then we can in turn support the other. 

Factors That Slow Down the Glymphatic System 

Sleep Deprivation 

Poor sleep slows the glymphatic system down, leaving more “junk” behind. Not great news, especially when we all can appreciate mental clarity, focus, elevated mood, and endless energy! 

Dehydration 

Staying hydrated supports our glymphatic system. Water helps to intensify the stream of cerebrospinal fluid swishing around your brain to take away those toxins. This important fluid is about 99% water! 

Alcohol and Heavy Eating Right Before Bed 

Both can disrupt sleep stages, especially deep sleep, which is when glymphatic cleanup is most active. 

Stress 

Relaxation (like breathwork or light stretching) can improve glymphatic flow by lowering cortisol and inflammation. 

So, what are some of those “no-brainer” healthy habits we can do? 

1. Prioritize Quality Sleep 

Deep sleep is essential for glymphatic activity. The goal should be between 7-9 hours per night. 

Tip: Stick to a regular sleep schedule and limit blue light in the evening. 

2. Stay Well Hydrated 

Aim for at least half your body weight in ounces of water per day (more if you’re active or in heat). 

3. Get Regular Exercise 

Physical activity improves circulation and helps pump cerebrospinal fluid more effectively. 

Even a brisk 30-minute walk counts. If you have questions about exercise and how to get the best bang for your buck, check out our Exercise section on our website for some more tips and tricks. 

4. Practice Deep Breathing or Breathwork 

Deep, diaphragmatic breathing helps move cerebrospinal fluid. 

5. Limit Chronic Inflammation 

Inflammation clogs the system and reduces flow. 

Daily anti-inflammatory foods like turmeric, leafy greens, berries, olive oil, and omega-3s support smoother glymphatic function. 

6. Keep Your Neck Mobile and Relaxed 

Poor posture or tight neck muscles can restrict CSF flow. 

Incorporate gentle neck stretches or chiropractic care if needed. 

7. Sauna or Hot/Cold Therapy 

These may improve circulation and encourage detox pathways (glymphatic system included). Bonus: They also promote better sleep! 

8. Be Mindful of Everyday Toxins 

Reduce your load from environmental sources (plastics, air fresheners, heavy metals, pesticides). More toxins = more waste your brain has to clear overnight. 

Power of Sleep and Healthy Habits 

There’s a lot that is happening in our bodies, even when we are sleeping. Much more than just “resting and resetting”; our body goes into repair mode when we are sleeping. 

Deep sleep = better drainage = fewer inflammatory signals = stronger immunity. 

This is why the Rose Health team focuses on the best ways to nourish our bodies with all the good things we deserve! Because so many cellular functions rely on these healthy habits.