Amino acids
L-Theanine — timing, dose & interactions
Amino acid from tea leaves that promotes relaxed alertness; small human trials suggest benefits for stress and sleep quality.
Timing
When to take it
Bedtime for sleep quality, or in the morning with coffee to smooth out caffeine.
Interactions
L-Theanine with other supplements
Safety
Medications & health conditions
L-theanine may add a mild calming effect. Usually mild, but be cautious when first combining with sleep medication.
Buying guide
What to look for on the label
L-Theanine
- Suntheanine® (pure L-isomer)
FAQ
Common questions
When is the best time to take L-Theanine?
Bedtime. Bedtime for sleep quality, or in the morning with coffee to smooth out caffeine.
Should L-Theanine be taken with food?
It can be taken with or without food. Bedtime for sleep quality, or in the morning with coffee to smooth out caffeine.
Can you take L-Theanine with Ashwagandha?
Yes — just be aware the calming effects may add up, especially at night. Start one at a time. Avoid combining with alcohol or sleep medications without advice.
Can you take L-Theanine with Caffeine?
Yes — it's one of the best-studied supplement pairings. Take them together in the morning. Avoid caffeine after early afternoon.
Sources