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 (form not stated)

On Reddit, owners rate Magnesium (form not stated) higher overall (4.1 vs 4.0). Scores summarize self-reported experiences and are not evidence that either will work for you.

L-theanineMagnesium (form not stated)
Typecapsulescapsules, tablets or powder
CalmVerdict score4.04.1
Owner sentiment3.53.6
Recommendations4.85.0
Tolerability4.44.5
Owner comments330438
Rated comments196274
Unwanted effects reported14%11%
Top praiseCalming effect, Dose & timingCalming effect, Dose & timing
Top complaintsSide effects, Calming effectSide effects, Dose & timing

By concern

ContextL-theanineMagnesium (form not stated)
Anxiety & worry35 of 71 positive43 of 96 positive
Low mood13 of 30 positive21 of 47 positive
Everyday stress25 of 52 positive41 of 74 positive
Panic attacks11 of 20 positive6 of 27 positive
Rumination & intrusive thoughts2 of 4 positive2 of 4 positive
Physical tension3 of 7 positive6 of 15 positive
PMS & PMDD moodToo few comments2 of 4 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 (form not stated)

5/5

“For my own personal experience adding magnesium made a huge difference.”

owner comment via r/Anxiety · 2026-05-21 · 32 upvotes
4/5 Calming effectSide effects

“All minerals compete for the same absorption mechanism so if you're overloading on magnesium then zinc, copper and/or calcium might be out of whack.”

owner comment via r/Supplements · 2026-09-08 · 6 upvotes
1/5 Calming effect

“Magnesium biglycinate. It didn't calm me but did the opposite. Horrible supplement for me.”

owner comment via r/Supplements · 2026-06-13 · 25 upvotes

Full Magnesium (form not stated) page →

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

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