Medical disclaimer: CalmVerdict summarizes what people say about 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 take an antidepressant or other medicine, are pregnant, or have a medical condition. Do not stop or change prescribed medicine on your own. If you are in crisis or thinking about suicide, call or text 988 (US) or your local emergency number. Full disclaimer.

L-theanine vs Magnesium glycinate

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

L-theanineMagnesium glycinate
Typecapsulescapsules or powder
CalmVerdict score4.04.0
Owner sentiment3.53.5
Recommendations4.84.8
Tolerability4.44.4
Owner comments330370
Rated comments196228
Unwanted effects reported14%14%
Top praiseCalming effect, Dose & timingCalming effect, Dose & timing
Top complaintsSide effects, Calming effectSide effects, Dose & timing

By concern

ContextL-theanineMagnesium glycinate
Anxiety & worry35 of 71 positive43 of 114 positive
Low mood13 of 30 positive13 of 41 positive
Everyday stress25 of 52 positive33 of 56 positive
Panic attacks11 of 20 positive8 of 20 positive
Rumination & intrusive thoughts2 of 4 positive2 of 6 positive
Physical tension3 of 7 positive6 of 14 positive
PMS & PMDD moodToo few comments2 of 3 positive

What owners say about L-theanine

2/5 Calming effect

“Theanine, because I had tried it for evening calm and it didn't do anything for me.”

owner comment via r/Supplements · 2026-08-05 · 50 upvotes
4/5 Calming effectTaste & form

“The I found a liquid L theanine and that made all the difference in the world.”

owner comment via r/Supplements · 2026-09-12 · 13 upvotes
4/5 Calming effectFalling asleep

“l-theanine is the only one that's worked for me.”

owner comment via r/Nootropics · 2026-09-17 · 12 upvotes

Full L-theanine page →

What owners say about Magnesium glycinate

2/5 Falling asleepTakes time

“Started magnesium glycinate for sleep, didn't really knock me out but after two weeks I noticed my jaw wasn't clenched into a fist all day.”

owner comment via r/Supplements · 2026-08-13 · 35 upvotes
4/5

“Magnesium glycinate, improved my sleep, fewer muscle twitches, and helped me feel less tension etc.”

owner comment via r/Supplements · 2026-05-11 · 28 upvotes
4/5 Calming effect

“Magnesium glycinate also helps me chill out when my brain won't stop racing but takes maybe an hour to kick in”

owner comment via r/Supplements · 2026-05-05 · 24 upvotes

Full Magnesium glycinate page →

More detail: L-theanine side effects · L-theanine dosage and timing · Magnesium glycinate side effects · Magnesium glycinate dosage and timing

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