Glycine
“glycine on its own was the missing piece for me for years.”
What owners report →
Illustration, not a product photo.
An amino sulfonic acid often taken in the evening.
59 owner comments (35 with a clear rating) from r/Supplements, r/sleep, r/insomnia, r/Nootropics, May 2026 to October 2026. Top 70% of the 20 rated supplements.
Value for money: Not rated. The example products differ too much in dose to compare cost fairly. How we score.
Taurine is rated below most supplements we track: 3.5/5. Of 35 rated owner comments, 31 were positive, 2 mixed and 2 negative; 4 mention an unwanted effect. People talk most about falling asleep faster and side effects.
Reddit comments are self-reported and unverified. They tell you what people noticed, not whether a supplement works or is safe for you.
Before mixing them, read how amino acid sleep aids differ. People also compare supplements for morning grogginess on Reddit. Reddit owners also rank supplements by sleep quality reports.
Supplements can interact with medicines. Talk to a doctor or pharmacist first, especially if you are pregnant, take prescription medicine (including sleep, anxiety or antidepressant medicines), or have ongoing sleep problems. See sleep supplement safety and interactions.
| Context | Rated owner comments | Positive | Negative | Unwanted effects |
|---|---|---|---|---|
| Falling asleep | 4 | 4 | 0 | 0 |
| Deep sleep | 4 | 3 | 0 | 0 |
| Morning grogginess | 3 | 2 | 0 | 3 |
4/5“Recently I've seen improvement by taking magnesium and taurine before bed.”
4/5 CalmingSide effects“I used to have severe health anxiety and deal with stress daily, tried alot of stuff, Taurine in the morning and magnesium before bed helped mostly, I noticed less brain fog and more calm and focus during the day, idk is it directly…”
4/5 Calming“I would also suggest adding 200mg of theanine to your stack, possibly in place of the taurine.”
2/5“Taurine doesn't help me sleep and B vitamins often wake me.”
2/5 Side effects“Most supplements are crap, iv taken supplements over 10 years, from all kinds of nootropics to supplements to food supplements, they all seem to have some side effect, amino acids seems to work the best, like taurine, but even then I…”
4/5“When I combine it with a little taurine sleep gets even better.”
4/5“Taurine helps me with the intrusive thoughts and nac does negatively affect my sleep.”
5/5 Mood“Taurine, the amount of benefits for the body is amazing, especially cognition and sleep.”
3/5 Deeper sleep“Honestly taurine. Barely anyone talks about it compared to the big mainstream supplements but it noticeably helped my sleep quality, stress levels and even workouts a bit. I started with 1g before bed and noticed within a few days that I…”
4/5“Taurine really helps me get back to sleep faster when I do wake up and sometimes keeps me from remembering that I even woke up.”
4/5“I bet the added taurine will work better for you than glycine 👍”
4/5 Fast-actingMorning grogginess“I have sleep maintenance insomnia and 2 grams of taurine helps me knock out within 30 minutes of waking up between 2-4 am when I wake up in middle of the night without feeling groggy the next day.”
4/5 Stomach upset“After first reading about it here, I started taurine.”
4/5 Deeper sleep“Somebody suggested taking L-Taurine before bed.”
4/5 Stomach upsetTaste & form“But try lemongrass tea and seriously consider adding taurine (taurine is so strong for me it feels like diet Zann).”
4/5“I do take taurine and I REALLY prioritize sleep.”
4/5 Falling asleep faster“Taurine and glycine at night knock me out the following day too.”
4/5 Falling asleep faster“Magnesium glycinate helped me fall asleep sooner but adding 1000mg Taurine to that kept me asleep for the full 8 hours.”
4/5“I just started Taurine to help with insomnia, jury still out on effects for me”
4/5 Deeper sleepFalling asleep faster“I've been taking 1g of Taurine each night in addition to Magnesium Glycinate for quite a while now and have found that it significantly helps me to fall asleep and stay asleep.”
4/5“I recall seeing taurine banned in Europe over 20 years ago ..”
4/5“What I know about mag taurate is that it's magnesium on a base of taurine.”
4/5“I use Glycinate, Taurine with magnesium to help with the gaba receptors.”
4/5“I noticed better sleep after taking taurine.”
4/5“I take with magnesium, glycine, and taurine supplements 30 minutes before bed, with a watered down version of CBTI and my sleep has improved…Best of luck”
4/5“High doses of taurine was way more effective for me personally!!”
4/5“Notable among those I was deficient in were glycine, taurine, and serotonin.”
4/5 Falling asleep faster“Started them individually and then all at once and ive even added NAC and taurine into the mic and have seen great effects as far as falling asleep!”
4/5“Glycin + taurine works better for me.”
4/5“I take glycine, taurine and magnesium before bed.”
4/5“In my case i had a big improvement taking L-Taurine right before going to bed.”
These are examples of Taurine products sold on Amazon. They are not ranked by Reddit and the score above is for the ingredient, not a specific product. Check the label for dose and other ingredients.
Published studies (we list them so you can read the evidence yourself; inclusion is not an endorsement):
Across 59 Reddit comments from people who say they have used it for sleep, 31 of 35 rated comments were positive and 2 negative, for a SnoozeVerdict score of 3.5/5. These are self-reported experiences, not clinical evidence.
4 of 35 rated owner comments (11%) describe an unwanted effect such as grogginess, headaches, vivid dreams or an upset stomach. Check the safety notes on this page and ask a doctor or pharmacist before starting.
Most rated owner comments come from people who struggle to fall asleep (4 comments, 4 positive).
No. The score summarizes Reddit owner comments only. Factual statements on this page link to NIH or PubMed sources, and nothing here is medical advice.
“glycine on its own was the missing piece for me for years.”
What owners report →
“I've been taking l-theanine for like 8 years now, no side effects, withdrawls when I stop, or anything negative from it at all.”
What owners report →
“I take tyrosine daily but I only take 5-htp once in a while on a weekend where I can sleep in a bit longer.”
What owners report →Comparisons: Taurine vs Glycine
Last updated 2026-11-04. Mentions scanned: 208 in 166 threads.