How Much Sleep Is Needed for Glymphatic Flow (Brain Cleaning)?
One function of sleep is the clearance of toxic waste byproducts through a newly discovered drainage system in the brain. Glymphatic brain filtration may help explain why those who routinely get fewer than seven hours of sleep a night are at increased risk of developing cognitive disorders, such as dementia.
In the next video, I share the best sleeping position for glymphatic flow ( ).
For how to sleep better in general, see How to Get a Good Night’s Sleep Without Sleeping Pills ( ).
New subscribers to our e-newsletter always receive a free gift. Get yours here: .
Have a question about this video? Leave it in the comment section at and someone on the NutritionFacts.org team will try to answer it.
UPDATE: We are currently testing the removal of the comment section across all video pages until October, and it will either be reinstated thereafter or removed permanently based on the results. Please feel free to continue your discussions by commenting on our YouTube channel and social media accounts, where we will have Health Support volunteers available to address questions.
Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at . You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.
Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM
Captions for this video are available in several languages; you can find yours in the video settings. View important information about our translated resources:
• Subscribe:
• Donate:
• Podcast :
• Books:
• Shop:
• Facebook:
• Twitter:
• Instagram:
So doesn’t answer how much sleep is needed and doesn’t say how to improve sleep to help the cleaning process at all. Title should be introduction about the glymphatic system.
Based on your cranky response I can guarantee we need more sleep than you got last night.
@@sevendeadlychinsNot really the title was clickbait, that’s just a fact.
7 hours for the average person is best. He already has a Video and a Video Series about a Topic always starts with a Tilte like that. The Title is the introduction to a few Videos about it.
@@highimwolfMore sleep for you too.
He’s just reading off research for ya
Everyone varies but we know the general recommended amounts of sleep we should aim for. He also explains the risks of getting less than 7 hours of sleep so 7 hours is a good benchmark for most people.
I hate that we torture animals to learn these things 😢
boo hoo.
@@col8353 Look I get it, you are young possibly teenager, edgy and believe empathy to be a weakness and such but as much as you might believe otherwise. Mocking someones saddened demeanor is not the tough guy act you think it is. Killing animals no matter how necessary it might be in your eyes does not make it something to not feel sad over. If kicking a puppy is not cool and acceptable (in normal social circumstances. unless you are someone heavily traumatized that disgusting behavior might to you be acceptable) then why would sleep depriving and killing mice be either?
Very interessting! Trank YouTube 😊
I wonder how people that can sleep no more than 4 hours or sometimes less/none and still feel rested(not need more sleep) if those small tubes that carry away brain toxins operate more efficiently at night or they operate during the day or how that works. There must be something genetic to it(im not counting workaholics who choose to get 4 hours of sleep).
They’re talking bs, they don’t sleep so few hours.
Caffeine and chocolate is the answer, drugs.
yep, thats often the case indeed, they dont count the naps etc@@ichigokurosaki7762
ah ye, another cliff hanger to sleep on
How do we counter this age related glymphatic decline? Let me guess…beans beans beans and greens greens greens. Haha.
Funny 🤣
Glad to have a child so there is not much sleep at all
Thanks for the insight on the brain.
There is a detailed study showing that yogic breathing activates this same glymphatic activity. Basically slow deep diaphragm and abdominal breathing.
I’m really interested….could you provide me with the link to the study if there is one?thanks
Drinking water! U r welcome
A cliff hanger for sure!
What if use Benozo’s to sleep like I do?
A much better title for this video would be: what is the glymphatic system? But I guess even health education videos are a victim of the algorithms and have to do clickbaity titles 😂
Your lecture in Oregon last night was top notch! Thank you for your tireless work to educate the masses about the power we have over our health outcomes! 💚🙌✨