Various
L-Theanine
87/100
SUPPIE SCORE
85/100
EFFICACY
High
SAFETY
86/100
CLEANLINESS
What Does L-Theanine Do?
Strong evidence supports 200 mg L-Theanine for relaxation and sleep quality without grogginess. Doses align with research.
Is 200mg L-Theanine enough to improve sleep quality or should I take more?
Can I combine L-Theanine with magnesium and glycine every night without tolerance issues?
How long before bed should I take this stack for best results?
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What Are the Benefits of L-Theanine?
Based on proven scientific research
Sleep QualityStrong
RelaxationStrong
Anxiety ReductionModerate
Focus without SedationModerate
Good For:
What Are the Side Effects of Various L-Theanine?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•Generally recognized as safe (GRAS) up to 250-400 mg daily
•May enhance effects of sedatives or blood pressure medications
•Safe for most adults; limited pregnancy safety data
•Avoid if allergic to green tea or coconut (softgel versions)
•Rare mild side effects: headache, dizziness at high doses
•No major known long-term safety concerns at recommended doses
Potential Side Effects
Negative Interactions
Allergens
Coconut (in some softgels)Green tea (rare)
Inactive Ingredients
Hypromellose
Low RiskRice flour
Low RiskStearic acid
Low RiskSilicon dioxide
Low RiskMagnesium stearate
Low RiskMicrocrystalline cellulose
Low RiskOrganic coconut oil
Low RiskWhat Are the Ingredients in Various L-Theanine?
L-Theanine
200mg
Magnesium Glycinate
300-400mg
Glycine
3g
Hypromellose
Rice Flour
Stearic Acid
Silicon Dioxide
Magnesium Stearate
Microcrystalline Cellulose
Organic Coconut Oil
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Dosage & Bioavailability
How the active doses and forms in L-Theanine compare to the research.
•L-Theanine is listed at 200mg per serving; without a source-specific reference range, dose adequacy cannot be graded.
•Magnesium Glycinate is listed at 300-400mg per serving; without a source-specific reference range, dose adequacy cannot be graded.
Sources & References
Sleep
Information from ingredientmd.com
Theanine l theanine
Information from www.webmd.com
L theanine 100 mg veg capsules
Information from www.nowfoods.com
S1043661819307790
Information from www.sciencedirect.com
L theanine
Information from www.healthline.com
L theanine
Information from integrativepro.com
Frequently Asked Questions
Common questions about Various L-Theanine