L-theanine vs Melatonin
One adjusts your clock, the other adjusts your volume. Melatonin is a circadian signal with moderate evidence for schedule-related sleep problems. L-theanine promotes relaxed calm without sedation, also at moderate evidence, and never tells your body what time it is.
If falling asleep fails because your mind is loud, that's theanine's lane. If it fails because your schedule moved, that's melatonin's.
| Attribute | L-theanine | Melatonin |
|---|---|---|
| Best for | Racing-mind evenings, stress-flavored sleeplessness | Jet lag, shift work, drifted schedules |
| Evidence | Moderate for relaxed calm without sedation | Moderate for circadian-related sleep issues |
| Daily dose | 100-400 mg | 0.5-5 mg, lowest effective |
| When | Evening, flexible; works any time | 30-90 minutes before target bedtime |
| Watch for | Blood pressure medication interaction | Keep use short-term; not for pregnancy |
Which one should you take?
Pick L-theanine if
the barrier to sleep is mental noise rather than timing. It's gentle enough for daily use and shows up in the sleep stack on exactly those terms.
Pick Melatonin if
your sleep timing is the problem. Use the lowest dose that works, aim it 30 to 90 minutes before the bedtime you want, and retire it once the schedule sticks.
Can you take both?
No interaction stands between them, and the combination covers both failure modes: theanine for the noise, melatonin for the clock. Keep melatonin low (0.5 to 1 mg) and short-term while theanine handles the nightly baseline.
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