Life Extension
Life Extension L-Theanine
89/100
SUPPIE SCORE
82/100
EFFICACY
High
SAFETY
94/100
CLEANLINESS
What Does Life Extension L-Theanine Do?
This Life Extension product delivers 200 mg of AlphaWave® L-Theanine, a patented form with strong clinical evidence for reducing perceived stress, lowering cortisol, and increasing alpha brain waves after both single doses and 28 days of use. It offers reliable support for relaxation and mental clarity without sedation at the studied dose.
How does 200 mg AlphaWave® L-Theanine compare to standard L-theanine for stress reduction?
What is the best time of day to take this for relaxation without drowsiness?
Can I combine this with caffeine or other supplements for focus?
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What Are the Benefits of Life Extension L-Theanine?
Based on proven scientific research
Stress reductionVery strong
Promotes relaxation without sedationStrong
Supports cognitive function and attentionModerate
May improve sleep qualityModerate
Good For:
What Are the Side Effects of Life Extension Life Extension L-Theanine?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•AlphaWave® L-Theanine at 200 mg daily is well-tolerated with no serious adverse events reported in 28-day trials.
•May cause mild, transient side effects like headache or dizziness in sensitive individuals.
•No known significant drug interactions at this dose; safe with common stimulants like caffeine.
•Suitable for most adults; limited data in pregnancy or breastfeeding warrants caution.
•Contains no common allergens such as gluten, dairy, or nuts.
Potential Side Effects
Negative Interactions
Allergens
None in formulation
Inactive Ingredients
Microcrystalline cellulose
Low RiskVegetable cellulose (capsule)
Low RiskSilica
Low RiskVegetable stearate
Low RiskWhat Are the Ingredients in Life Extension Life Extension L-Theanine?
AlphaWave® L-Theanine
200 mg
Microcrystalline cellulose
vegetable cellulose (capsule)
silica
vegetable stearate
Dosage & Bioavailability
How the active doses and forms in Life Extension L-Theanine compare to the research.
•AlphaWave® L-Theanine is listed at 200 mg per serving; without a source-specific reference range, dose adequacy cannot be graded.
•AlphaWave® L-Theanine is a branded source, but the name alone does not establish a distinct chemical form or absorption advantage.
Sources & References
L theanine
Information from www.lifeextension.com
L theanine
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L Theanine 100 mg 60 vegetarian capsules
Information from lifeextensionvitamins.com
47819
Information from www.iherb.com
L theanine 100 mg 60 capsules life extension.html
Information from www.vitacart.com
34562208
Information from pubmed.ncbi.nlm.nih.gov
Item00987
Information from www.lifeextension.com
PMC8475422
Information from pmc.ncbi.nlm.nih.gov
Supplements
Information from www.lifeextension.com
PMC6836118
Information from pmc.ncbi.nlm.nih.gov
38758503
Information from pubmed.ncbi.nlm.nih.gov
2025
Information from www.lifeextension.com
PMC11263523
Information from pmc.ncbi.nlm.nih.gov
Emotional health
Information from www.lifeextension.com
Frequently Asked Questions
Common questions about Life Extension Life Extension L-Theanine