Verdict
Strong consensus for
Alcohol before bed worsens sleep quality even though it speeds falling asleep.
9 sources: 6 positive, 3 partly
By Arun AgrahriLast reviewed
Short answer
Alcohol makes you fall asleep faster, but it sedates you rather than building real sleep. As your body clears it, sleep fragments and REM drops, and it makes you urinate more, so you surface more. Matthew Walker and Andrew Huberman say even one drink costs you sleep quality. Peter Attia puts his own line at two drinks.
Sleep is the most important pillar of health and longevity.
The verdict on Sleep overall. 8 sources: 4 positive, 4 partly
positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.
Alcohol before bed worsens sleep quality even though it speeds falling asleep.
9 sources: 6 positive, 3 partly.
Researchers say
6 positive, 3 partly
Kristen Holmes, on The Diary Of A CEO, at 30:14
Positive Video · Opinion
Open the tape at 30:14 →“metabolize alcohol you're diverting all you know significant resources away from the Regeneration and the recovery that needs to happen during sleep”
Matthew Walker, 5 mentions on this claim
Positive Video
on The Drive, at 22:29 · positive
“you lose consciousness faster when you put yourself in bed it's hard to say that you're going into naturalistic sleep your sleep becomes more fragmented”
on The Diary Of A CEO, at 1:41:36 · positive
“it makes for miserable lousy quality sleep and the final thing is that alcohol is very good at blocking your REM sleep”
on FoundMyFitness, at 2:23:27 · positive
“And that's why you think that you fall asleep faster. There are two other problems with alcohol. Firstly, alcohol will litter your sleep with”
on The Drive, at 02:10 · positive
“you lose consciousness faster when you put yourself in bed it's hard to say that you're going into naturalistic sleep your sleep becomes more fragmented”
on The Drive, at 02:16 · positive
“your sleep becomes more fragmented because the alcohol will actually stimulate the fight or flight branch of the nervous system”
Mark Hyman, 4 mentions on this claim
Positive Video
on The Dr. Hyman Show, at 34:47 · positive
“when i look at my quality of sleep i sleep square after i had you know a few glasses of wine”
on The Dr. Hyman Show, at 26:39 · positive
“i noticed the next that night that my my heart rate didn't lower my temperature lower that my sleep was more disrupted”
on The Dr. Hyman Show, at 02:39 · positive
“caffeine is an upper alcohol is a downer and those often will screw up sleep”
on The Dr. Hyman Show, at 01:24 · partly
“it is a super bad sleep disruptor”
Dr. Michael Grandner, on FoundMyFitness, at 2:13:18
Positive Video · Opinion
Open the tape at 2:13:18 →“they fall asleep fast, but then they wake up in the middle of the night and can't can't get back to sleep”
Rangan Chatterjee, on Rangan Chatterjee's channel, at 2:41:59
Positive Video · Opinion
Open the tape at 2:41:59 →“there's no other way of saying alcohol trashes our Sleep Quality”
Michael Breus, on The Diary Of A CEO, at 34:47
Positive Video · Opinion
Open the tape at 34:47 →“If you're using alcohol as a stress relief tool at night before bed, it's messing up your sleep probably pretty bad.”
Peter Attia, 3 mentions on this claim
Partly Video
on The Drive, at 00:53 · positive
“so alcohol fragments sleep you wake up more times during the night”
on The Drive, at 09:26 · partly
“even though when you have a few drinks you're groggy and you think you're sleeping better you're just less conscious but you're actually sleeping worse”
on The Drive, at 03:47 · partly
“very difficult to have a good night's sleep if you have alcohol in the proximity of bedtime”
Dr. Mary Claire Haver, on Huberman Lab, at 2:08:28
Partly Video · Opinion
Open the tape at 2:08:28 →“if I choose socially to have more than a glass of wine I am giving up sleep”
Bryan Johnson, on Bryan Johnson's channel, at 04:16
Partly Video · Opinion
Open the tape at 04:16 →“if I drink any alcohol in the latter part of the day my deep sleep is going to be about 80% less”
Studies show
No study counted yet.
Kristen Holmes, on The Diary Of A CEO, at 30:14 Video · positive · Opinion
“metabolize alcohol you're diverting all you know significant resources away from the Regeneration and the recovery that needs to happen during sleep”
Matthew Walker Video · positive · 5 mentions
on The Drive, at 22:29 · positive · Opinion
“you lose consciousness faster when you put yourself in bed it's hard to say that you're going into naturalistic sleep your sleep becomes more fragmented”
on The Diary Of A CEO, at 1:41:36 · positive · Opinion
“it makes for miserable lousy quality sleep and the final thing is that alcohol is very good at blocking your REM sleep”
on FoundMyFitness, at 2:23:27 · positive · Opinion
“And that's why you think that you fall asleep faster. There are two other problems with alcohol. Firstly, alcohol will litter your sleep with”
on The Drive, at 02:10 · positive · Opinion
“you lose consciousness faster when you put yourself in bed it's hard to say that you're going into naturalistic sleep your sleep becomes more fragmented”
on The Drive, at 02:16 · positive · Opinion
“your sleep becomes more fragmented because the alcohol will actually stimulate the fight or flight branch of the nervous system”
Mark Hyman Video · positive · 4 mentions
on The Dr. Hyman Show, at 34:47 · positive · Opinion
“when i look at my quality of sleep i sleep square after i had you know a few glasses of wine”
on The Dr. Hyman Show, at 26:39 · positive · Opinion
“i noticed the next that night that my my heart rate didn't lower my temperature lower that my sleep was more disrupted”
on The Dr. Hyman Show, at 02:39 · positive · Opinion
“caffeine is an upper alcohol is a downer and those often will screw up sleep”
on The Dr. Hyman Show, at 01:24 · partly · Opinion
“it is a super bad sleep disruptor”
Dr. Michael Grandner, on FoundMyFitness, at 2:13:18 Video · positive · Opinion
“they fall asleep fast, but then they wake up in the middle of the night and can't can't get back to sleep”
Rangan Chatterjee, on Rangan Chatterjee's channel, at 2:41:59 Video · positive · Opinion
“there's no other way of saying alcohol trashes our Sleep Quality”
Michael Breus, on The Diary Of A CEO, at 34:47 Video · positive · Opinion
“If you're using alcohol as a stress relief tool at night before bed, it's messing up your sleep probably pretty bad.”
Peter Attia Video · partly · 3 mentions
on The Drive, at 00:53 · positive · Opinion
“so alcohol fragments sleep you wake up more times during the night”
on The Drive, at 09:26 · partly · Opinion
“even though when you have a few drinks you're groggy and you think you're sleeping better you're just less conscious but you're actually sleeping worse”
on The Drive, at 03:47 · partly · Opinion
“very difficult to have a good night's sleep if you have alcohol in the proximity of bedtime”
Dr. Mary Claire Haver, on Huberman Lab, at 2:08:28 Video · partly · Opinion
“if I choose socially to have more than a glass of wine I am giving up sleep”
Bryan Johnson, on Bryan Johnson's channel, at 04:16 Video · partly · Opinion
“if I drink any alcohol in the latter part of the day my deep sleep is going to be about 80% less”
Alcohol before bed worsens sleep quality even though it speeds falling asleep.
Kristen Holmes, on The Diary Of A CEO, at 30:14
Positive Video · Opinion
Open the tape at 30:14 →“metabolize alcohol you're diverting all you know significant resources away from the Regeneration and the recovery that needs to happen during sleep”
Matthew Walker, 5 mentions on this claim
Positive Video
on The Drive, at 22:29 · positive
“you lose consciousness faster when you put yourself in bed it's hard to say that you're going into naturalistic sleep your sleep becomes more fragmented”
on The Diary Of A CEO, at 1:41:36 · positive
“it makes for miserable lousy quality sleep and the final thing is that alcohol is very good at blocking your REM sleep”
on FoundMyFitness, at 2:23:27 · positive
“And that's why you think that you fall asleep faster. There are two other problems with alcohol. Firstly, alcohol will litter your sleep with”
on The Drive, at 02:10 · positive
“you lose consciousness faster when you put yourself in bed it's hard to say that you're going into naturalistic sleep your sleep becomes more fragmented”
on The Drive, at 02:16 · positive
“your sleep becomes more fragmented because the alcohol will actually stimulate the fight or flight branch of the nervous system”
Mark Hyman, 4 mentions on this claim
Positive Video
on The Dr. Hyman Show, at 34:47 · positive
“when i look at my quality of sleep i sleep square after i had you know a few glasses of wine”
on The Dr. Hyman Show, at 26:39 · positive
“i noticed the next that night that my my heart rate didn't lower my temperature lower that my sleep was more disrupted”
on The Dr. Hyman Show, at 02:39 · positive
“caffeine is an upper alcohol is a downer and those often will screw up sleep”
on The Dr. Hyman Show, at 01:24 · partly
“it is a super bad sleep disruptor”
Dr. Michael Grandner, on FoundMyFitness, at 2:13:18
Positive Video · Opinion
Open the tape at 2:13:18 →“they fall asleep fast, but then they wake up in the middle of the night and can't can't get back to sleep”
Rangan Chatterjee, on Rangan Chatterjee's channel, at 2:41:59
Positive Video · Opinion
Open the tape at 2:41:59 →“there's no other way of saying alcohol trashes our Sleep Quality”
Michael Breus, on The Diary Of A CEO, at 34:47
Positive Video · Opinion
Open the tape at 34:47 →“If you're using alcohol as a stress relief tool at night before bed, it's messing up your sleep probably pretty bad.”
Peter Attia, 3 mentions on this claim
Partly Video
on The Drive, at 00:53 · positive
“so alcohol fragments sleep you wake up more times during the night”
on The Drive, at 09:26 · partly
“even though when you have a few drinks you're groggy and you think you're sleeping better you're just less conscious but you're actually sleeping worse”
on The Drive, at 03:47 · partly
“very difficult to have a good night's sleep if you have alcohol in the proximity of bedtime”
Dr. Mary Claire Haver, on Huberman Lab, at 2:08:28
Partly Video · Opinion
Open the tape at 2:08:28 →“if I choose socially to have more than a glass of wine I am giving up sleep”
Bryan Johnson, on Bryan Johnson's channel, at 04:16
Partly Video · Opinion
Open the tape at 04:16 →“if I drink any alcohol in the latter part of the day my deep sleep is going to be about 80% less”
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A claim from podcasts on this question, checked against the studies that test it.
Of 7 studies that test it, 5 partly agree and 2 agree.
Alcohol before bed worsens sleep quality even though it speeds falling asleep. Falling asleep fast and sleeping well are two different things, and alcohol is the clearest example of the gap. Sleep scientist Matthew Walker, a guest on Peter Attia's show, makes the point that this is sedation, not sleep.
It knocks you out, and being knocked out is not the same as rest, which is why people say alcohol "helps" them sleep.
Your body works through the alcohol over the night. That fragments your sleep and cuts REM, the stage tied to memory and mood. Alcohol also blocks vasopressin, the hormone that holds water back, so you make more urine and wake more often.
A nightcap can leave you wide awake at 3am and foggy the next day, even though you fell asleep fast. Wearables show it too: heart rate variability drops and resting heart rate climbs on nights you drink. Walker makes the same case as a guest on The Diary of a CEO.
Huberman, on his own show, and Walker draw the line at one drink. Attia's own sleep tracking puts his line at two, so this is not only a heavy-drinking problem. Early waking has many causes, so alcohol is not the only suspect if you wake at 3am.
But if you drink most evenings, it is a cheap thing to cut and test. This page reports what was said on tape and is not medical advice.
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