SupplementsL-Theanine
Sunday Natural
Checked · still using it
My take
“Calming without sedation, and perfect with Glycine and Magnesium Acetyl Taurate for restful sleep.”
NiklasUpdated 19 Oct 2026 Love it
- Promotes calm alertness — relaxes without making you drowsy
- 100mg per capsule from pure green tea extract
- Works for both sleep (evening) and focus (daytime with coffee)
- No grogginess the next morning
Fair warning
- Effects are subtle — don't expect a sleeping pill
- Premium price for a single amino acid
- Needs consistent use for best results
This may be an affiliate link. I only recommend what I genuinely use.
The longer story
L-Theanine
L-Theanine is an amino acid found naturally in green tea. It promotes alpha brain waves — the same state you reach during meditation — without drowsiness.
Why I Recommend It
This is the second pillar of my sleep stack. What makes L-Theanine special is its versatility: at night, it quiets mental chatter so you fall asleep faster. During the day, paired with coffee, it takes the edge off caffeine and gives you smooth, focused energy.
The key insight: L-Theanine doesn't knock you out — it reduces the mental noise that keeps you awake. That's a crucial difference.
Dual Use: Sleep & Focus
- Evening: 200mg with Magnesium and Glycine → calm, deep sleep
- Morning: 100mg with coffee → focused energy without jitters
Key Takeaways
- Promotes alpha brain waves — measurable relaxation without sedation
- Sunday Natural uses pure green tea extract, not synthetic
- Doubles as a focus enhancer when paired with caffeine
- Part of the sleep trio: Magnesium + L-Theanine + Glycine
- 100mg capsules allow flexible dosing
Who It's For
Overthinkers who can't switch off at night, anyone who wants smoother caffeine energy during the day, or biohackers building an evidence-based supplement stack.
More supplements
Ranking
Transparency note: Some links on this page are affiliate links. If you buy through them, I may earn a small commission at no extra cost to you. I only recommend things I genuinely use and believe in. No paid placements, ever. (The commissions mostly go to Nugget’s treats.)