Does Glycine help with sleep?
Yes, for most people. 87% of 255 people who reported on Glycine for sleep say it improved. 5% noticed no change and 8% say it got worse. That is above the typical result for sleep (82% across 71 options).
Sleep: what users report
87%better255 reports · high confidence
222 better13 no change20 worse
Ranked #5 of 71 for sleep.
What people say about Glycine and sleep
“2 grams with 200mg magnesium before bed gives me crazy good sleep. Crazy vivid dreams.”
“Taking isolated glycine several days in a row makes me super groggy throughout the day. It puts me to sleep almost like a sedative.”
“I've been taking about 4.5 grams of glycine about an hour before bedtime to benefit sleep (the evidence on this seems relatively strong).”
“Someone on Reddit recommended 5000 mg of glycine a few hours before bed. Although not perfect, my score is now in the 70s and deep sleep is 45-60 min.”
What the research says
AResearch: Strong392 meta-analyses · 620 trials on PubMed
None of the top reviews we found look specifically at sleep. See all research on Glycine.
Side effects people mention
vivid dreams 12drowsiness 9fatigue 3brain fog 2tolerance 1
What else is Glycine used for?
Information only — not medical advice. How we count