Calm Focus & Resilient Sleep—Without Daytime Drowsiness
L-Theanine is a tea-derived amino acid that promotes a state of relaxed alertness. It helps quiet mental noise, smooth stress responses, and support sleep quality—while keeping you clear during the day. With consistent use, many people experience steadier focus, less edginess (including from caffeine), and easier wind-down at night.
What Makes L-Theanine Stand Out
- Alpha-wave support — associated with a calm, attentive mental state.
- Stress resilience — helps blunt overactive sympathetic responses during psychological stress.
- Sleep quality — eases pre-bed restlessness without sedative hangover.
- Caffeine synergy — pairs beautifully for clean energy, fewer jitters, and better task accuracy.
- Gentle, versatile — typically well tolerated; stacks easily with most routines.
What Is L-Theanine?
L-Theanine (the L-isomer of theanine) is a non-protein amino acid that is concentrated in tea leaves (Camellia sinensis) and select edible mushrooms. It crosses the blood–brain barrier and modulates key neurotransmitter systems involved in attention, relaxation, and sleep architecture.
Why L-Theanine Matters for Healthspan & High Functioning
Sustained performance requires the ability to stay calm under load, focus deeply, and sleep restoratively. L-Theanine supports these pillars without blunt sedation. Over years, that can translate into better learning, safer training, and steadier habits—foundational behaviors for a longer, higher-quality life.
How L-Theanine Works (Plain English)
- Tunes brain rhythms: supports relaxed alpha-wave activity—clear and calm.
- Balances excitatory/inhibitory tone: modulates glutamate signaling and gently supports GABA, dopamine, and serotonin pathways.
- Settles the stress response: can lower stress-induced heart-rate and blood-pressure spikes, helping you stay composed.
- Improves sleep quality: reduces pre-sleep mental chatter so the brain can transition smoothly into deeper stages.
- Synergizes with caffeine: offsets jitters while preserving vigilance and task accuracy.
Bottom line: L-Theanine promotes a calm, focused state during the day and an easier descent into sleep at night.
Evidence Snapshot (Human Studies)
- Acute relaxation: single doses of 100–200 mg can increase alpha activity and reduce subjective tension within 30–60 minutes.
- Stress reactivity: daily use (200–400 mg) has been associated with reduced stress-induced heart-rate and blood-pressure responses in controlled settings.
- Attention & accuracy: theanine plus caffeine (typical 2:1 ratio) improves attention switching, reaction time, and error rate compared with caffeine alone.
- Sleep quality: 200–400 mg in the evening can improve sleep quality scores—especially in people who feel “tired but wired.”
- Safety: generally well tolerated in trials up to 400–900 mg/day; most common reports are mild and transient (e.g., sleepiness at higher doses).
Notes: Outcomes vary; individual responses depend on baseline stress, caffeine intake, and sleep hygiene. Research supports supportive roles for theanine—no disease claims are made.
What’s Inside Doublewood L-Theanine
- Pure, 100% L-Theanine — free-form amino acid traditionally extracted from tea (Camellia sinensis) or produced via clean fermentation (Suntheanine® or equivalent).
- Clinically relevant potency — thoughtfully dosed per capsule so you can take one or combine two as needed.
- Vegetarian-friendly capsule — plant-based HPMC shell for easy swallowing.
- Clean excipients — minimal, functional carriers only (e.g., microcrystalline cellulose, magnesium stearate [vegetable source], silicon dioxide) to support consistency.
- Non-GMO & gluten-free — formulated without wheat, soy, or dairy.
- Third-party tested — verified for identity, potency, heavy metals, and microbial safety.
- cGMP manufacturing — produced in facilities following current Good Manufacturing Practices for quality you can trust.
- No sugars, dyes, or artificial flavors — nothing that interferes with daytime focus or evening wind-down stacks.
Where L‑Theanine Comes From & What Research Suggests
The origin
L‑Theanine is a major amino acid in green tea, thought to contribute to tea’s characteristic sense of calm focus. It has been investigated for decades for effects on brain waves, attention, stress, and sleep in both acute and longer studies.
Synergy & dose rhythm
- Onset: typically 30–60 minutes; effects can last several hours.
- Daytime focus: 100–200 mg; pair with 50–100 mg caffeine for clean energy.
- Evening wind‑down: 200–400 mg about 30–60 minutes before bed.
- Consistent calm: 100–200 mg once or twice daily for 2–4 weeks to gauge baseline effects.
Mechanistic highlights
Theanine appears to modulate glutamatergic signaling (including NMDA/AMPA), gently support GABA and serotonergic tone, and promote alpha-wave activity—correlating with relaxed alertness. It may temper stress‑related cortisol and sympathetic activation in some contexts.
Practical Stacking
For coffee optimizers: 2:1 theanine:caffeine (e.g., 200 mg theanine + 100 mg caffeine) for smoother energy & fewer jitters.
For deep work: 100–200 mg with hydration + electrolytes; add light protein if prone to hypoglycemia.
For stressful days: 200 mg late morning; optional 100–200 mg mid‑afternoon if needed.
For sleep: 200–400 mg pre‑bed; pair with magnesium glycinate or taurinate if appropriate.
Always test changes one at a time; adjust by response. Not a substitute for medical care.
Why Your Brain Likes Daily Theanine
In a world of constant inputs, the ability to relax without losing clarity is a superpower. Theanine supports that balance—helping you train, learn, and recover more smoothly while protecting sleep.
Nature-Built, Human-Friendly
Theanine occurs naturally in tea and is widely used in dietary supplements. It is non-habit forming and typically well tolerated.
General wellness support for healthy adults. This product is not intended to diagnose, treat, cure, or prevent any disease.
L-Theanine 120 Capsule x 200 mg Bottle
Our Price: $19.95
L-Theanine
How to Use
- Daytime focus: Take capsule upon waking or before deep work. Optional: pair with 50–100 mg caffeine for a 2+:1 theanine:caffeine stack.
- Stressful moments: one capsule 30–60 minutes before a known stressor (presentations, travel, competition).
- Evening wind‑down: one to two capsules 30–60 minutes before bed to ease rumination.
- Experiment thoughtfully: Start low; increase gradually. Consistency for 2–4 weeks helps reveal baseline effects.
- Stack smartly: Works well with magnesium supplements or lemon balm. Separate from sedatives unless guided by a clinician.
Videos and Audios about L-Theanine
We disclaim any claims (if there are any) made in these videos or audios. They are for information, education, enlightenment and entertainment only.
