Life Extension
L-Theanine XR
73/100
SUPPIE SCORE
85/100
EFFICACY
Low
SAFETY
52/100
CLEANLINESS
What Does L-Theanine XR Do?
L-Theanine XR offers excellent extended-release stress relief at a research-backed 200 mg dose, promoting calm without sedation. Highly safe for most adults with minimal side effects and strong evidence for anxiety and focus benefits.
How does L-Theanine XR help with stress relief compared to regular L-Theanine?
What dosage of L-Theanine is recommended for anxiety reduction?
Are there any long-term benefits of using L-Theanine for sleep improvement?
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What Are the Benefits of L-Theanine XR?
Based on proven scientific research
Stress ReductionStrong
Anxiety ReliefStrong
Improved FocusModerate
Sleep SupportModerate
Good For:
What Are the Side Effects of Life Extension L-Theanine XR?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•L-Theanine at 200 mg daily is well within safe limits (up to 1200 mg/day studied), with no serious adverse effects reported in clinical trials.
•No known significant drug interactions for this formulation; may enhance effects of sedatives or stimulants, but low risk overall.
•Safe for healthy adults; limited data on pregnancy/breastfeeding—consult physician; not recommended for children under 18.
•Vegetarian tablets free of common allergens; low risk of sensitivities from excipients like cellulose or stearic acid.
•Extended-release design minimizes GI upset; long-term use supported by studies showing no tolerance buildup or dependency.
•High-quality manufacturing by Life Extension; third-party testing reduces contamination risks.
Potential Side Effects
Negative Interactions
Inactive Ingredients
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
What Are the Ingredients in Life Extension L-Theanine XR?
L-Theanine
200 mg
Suntheanine (Suntheanine is a patented, pure form of L-theanine)
Microcrystalline cellulose
Dicalcium phosphate
Stearic acid
Croscarmellose sodium
Vegetable stearate
Silica
Hydroxypropyl methylcellulose
Glycerin
Sources & References
Frequently Asked Questions
Common questions about Life Extension L-Theanine XR