Medical disclaimer: SnoozeVerdict summarizes what people say about sleep supplements on Reddit. It is not medical advice, and nothing here is meant to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration. Talk to your doctor or pharmacist before starting a supplement, especially if you are pregnant, take medicines (including sleep or mood medicines), or have a medical condition. Poor sleep that lasts for months, loud snoring or gasping at night, or falling asleep during the day while driving or working needs a doctor, not a supplement. Full disclaimer.

L-theanine vs Magnesium glycinate

On Reddit, owners rate Magnesium glycinate higher overall (4.0 vs 3.8). Scores summarize self-reported experiences and are not evidence that either will work for you.

	L-theanine	Magnesium glycinate
Type	capsules	capsules or powder
SnoozeVerdict score	3.8	4.0
Owner sentiment	3.6	3.6
Recommendations	3.4	4.4
Tolerability	4.4	4.4
Owner comments	333	1039
Rated comments	173	602
Unwanted effects reported	14%	15%
Top praise	Dose & timing, Calming	Dose & timing, Deeper sleep
Top complaints	Side effects, Dose & timing	Side effects, Dose & timing

By sleep problem

Context	L-theanine	Magnesium glycinate
Falling asleep	23 of 27 positive	51 of 64 positive
Staying asleep	10 of 11 positive	36 of 49 positive
Morning grogginess	3 of 15 positive	25 of 55 positive
Deep sleep	15 of 16 positive	36 of 44 positive
Anxiety at night	6 of 8 positive	13 of 22 positive
Vivid dreams	1 of 4 positive	9 of 17 positive
Jet lag & shift work	Too few comments	4 of 4 positive

Here is what owners report about amino acid sleep aids. You can also compare all rated sleep aids on one page. For quick shortlists by sleep problem, see which sleep supplements Reddit rates highest.

What owners say about L-theanine

4/5 Falling asleep fasterTaste & form
“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.”

owner comment via r/Nootropics · 2026-06-26 · 8 upvotes

4/5 Taste & form
“I also recommend breaking 200mg pills into quarters, and try taking l-theanine with it.”

owner comment via r/Nootropics · 2026-08-03 · 11 upvotes

4/5 Deeper sleep
“You're not gonna feel anything like L-theanine, glycinate is so subtle I forgot I took it until I realized I slept through the night without waking up at 3am.”

owner comment via r/sleep · 2026-09-14 · 11 upvotes

Full L-theanine page →

What owners say about Magnesium glycinate

3/5 Side effects
“magnesium glycinate gave me the worst insomnia, everyone says it helps sleep but my brain just would not shut off for hours”

owner comment via r/Supplements · 2026-09-08 · 153 upvotes

5/5
“magnesium glycinate before sleep make huge difference for me, i can't go without now”

owner comment via r/Supplements · 2026-08-04 · 54 upvotes

3/5 Morning grogginessSide effects
“magnesium glycinate knocks me out cold but i wake up groggy if i take too much”

owner comment via r/Supplements · 2026-08-07 · 38 upvotes

Full Magnesium glycinate page →

Talk to a doctor or pharmacist before switching or combining supplements, particularly if you take other medicines.