L-Theanine Capsules | Pack of 30

What L-Theanine Does—When It’s the Right Form
L-Theanine is a naturally occurring amino acid found in green tea.

When delivered in a pure, bioidentical form, it supports:
✅ Alpha brain wave activity (relaxed alertness)
✅ Reduced stress perception
✅ Calm focus without drowsiness
✅ Smoother cognitive performance
✅ Better sleep quality through relaxation
This is why doctors recommend L-theanine for:
✅ Stress management
✅ Focus without stimulants
✅ Sleep support without sedatives
But purity matters.

Why Hi Life Uses Suntheanine® — The Global Gold Standard

Hi Life® Doctor’s Edition uses Suntheanine®, produced by Taiyo International—the most clinically studied L-theanine in the world.

What makes Suntheanine® different:
✔ bioidentical to natural L-theanine from tea
✔ produced via patented fermentation
✔ >99% purity
✔ clinically studied in humans
✔ non-sedating and non-habit forming
✔ trusted by neurologists and sleep specialists
✔ used under license
This ensures predictable calm—without compromise.

✅ L-Theanine (Suntheanine®)

The Modern Brain Problem Doctors See
Today’s brain is overstimulated:

✅ Constant screens
✅ Notifications
✅ Caffeine overload
✅ Information fatigue
✅ Poor sleep cycles

This pushes the nervous system into a state of hyper-alertness—calm disappears, focus fragments, sleep becomes shallow.

Doctors don’t aim to sedate the brain. They aim to stabilize it.That’s where L-theanine stands out.

What Clinical Science Shows

🔬 Relaxed Alertness & Brain Waves
Journal of Clinical Psychiatry
L-theanine supplementation supported:
• increased alpha brain wave activity
• relaxed mental state
• improved attentional control
Stress & Anxiety Reduction
Nutrients (2016)

L-theanine was associated with:
• reduced stress responses
• improved calmness
• better emotional regulation
Sleep Quality (Without Sedation)

Asia Pacific Journal of Clinical Nutrition
L-theanine supported:
• improved sleep quality
• reduced nighttime restlessness
• better morning alertness

Who Doctors Recommend L-Theanine For

Doctors commonly recommend L-theanine for:
✅ Professionals under cognitive stress
✅ Students needing calm focus
✅ Individuals sensitive to caffeine
✅ People with racing thoughts
✅ Those seeking non-sedative sleep support
✅ Longevity-focused users

This is not about escaping pressure. It’s about handling it with clarity.

Take as directed on the label, preferably with meals, or as advised by a healthcare professional.

Consistency matters more than intensity.

Standard shipping as per company policy.

The liver needs protection, antioxidant support, glutathione replenishment, and proper elimination, not harsh cleanses. A formulation combining Siliphos®, NAC, and supportive botanicals reflects how clinicians think about long-term liver health.

Will this make me sleepy?
No. L-theanine promotes relaxation without drowsiness.
Is it safe to take daily?
Yes. Designed for long-term daily use.
Can it be taken with caffeine?
Yes. L-theanine is often used to smooth caffeine-related jitters.
Does it help with sleep?
It supports better sleep by calming the mind—not by inducing sedation.
Is it vegetarian?
Yes.
Should people on medication consult a doctor?
Yes—always recommended.