Bock Nutritionals
L-Theanine 200
74/100
SUPPIE SCORE
78/100
EFFICACY
High
SAFETY
58/100
CLEANLINESS
What Does L-Theanine 200 Do?
Product delivers 400 mg Suntheanine® L-Theanine per serving, exceeding the 200 mg single-dose level tied to attention gains in meta-analysis and aligning with 100-400 mg studied ranges; evidence for stress and mood effects is more modest or inconsistent.
What dose of L-Theanine is typically studied for stress reduction?
How does Suntheanine® L-Theanine compare to generic forms in research?
Can L-Theanine be taken daily long-term without issues?
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What Are the Benefits of L-Theanine 200?
Based on proven scientific research
AttentionStrong
Stress reductionModerate
Anxiety supportMild
Depressive symptomsMild
Good For:
What Are the Side Effects of Bock Nutritionals L-Theanine 200?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•No serious adverse events reported in trials up to 400 mg/day.
•400 mg daily studied for 28 days with no clinically relevant lab changes.
•May interact with medications affecting GABA or glutamate pathways.
•Limited data on use during pregnancy or breastfeeding.
•Evidence insufficient for long-term safety beyond 4 weeks.
Potential Side Effects
Negative Interactions
Allergens
Free of common allergens per label verification
Inactive Ingredients
Hpmc (capsule)
Low RiskMicrocrystalline cellulose
Low RiskStearic acid
Low RiskMagnesium stearate
Low RiskSilica
Low RiskAnd medium-chain triglyceride oil. does not contain: wheat
Low RiskGluten
Low RiskCorn
Low RiskYeast
Low RiskSoy
Low RiskAnimal or dairy products
Low RiskFish
Low RiskShellfish
Low RiskPeanuts
Low RiskTree nuts
Low RiskEgg
Low RiskIngredients derived from genetically modified organisms (gmos)
Low RiskArtificial colors
Medium RiskArtificial sweeteners
Low RiskAnxiety with l-theanine! qty - 60 capsules l-theanine is a naturally occurring
Low RiskUnique amino acid found in green tea leaves. l-theanine has been found to reduce stress by promoting relaxation without drowsiness
Low RiskFunction supplement facts
Low RiskWhat Are the Ingredients in Bock Nutritionals L-Theanine 200?
L-Theanine (Suntheanine®)
400 mg
HPMC (capsule)
microcrystalline cellulose
stearic acid
magnesium stearate
silica
and medium-chain triglyceride oil. DOES NOT CONTAIN: Wheat
gluten
corn
yeast
soy
animal or dairy products
fish
shellfish
peanuts
tree nuts
egg
ingredients derived from genetically modified organisms (GMOs)
artificial colors
artificial sweeteners
anxiety with L-theanine! QTY - 60 Capsules L-Theanine is a naturally occurring
unique amino acid found in green tea leaves. L-theanine has been found to reduce stress by promoting relaxation without drowsiness
Function Supplement Facts
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Dosage & Bioavailability
How the active doses and forms in L-Theanine 200 compare to the research.
•L-Theanine (Suntheanine®) — 400 mg; single serving exceeds the 200 mg dose linked to attention improvements in meta-analysis of 31 RCTs.
•L-Theanine (Suntheanine®) — 400 mg; matches upper end of 100–400 mg daily clinical study range while remaining below levels with reported safety signals.
•L-Theanine (Suntheanine®) — 400 mg; the label does not disclose an extract standardisation percentage or marker amount.
Sources & References
L theanine 200 mg
Information from www.bocknutritionals.com
Theanine
Information from examine.com
35111479
Information from pubmed.ncbi.nlm.nih.gov
PMC8059493
Information from pmc.ncbi.nlm.nih.gov
Pubmed.ncbi.nlm.nih.gov
Information from pubmed.ncbi.nlm.nih.gov
PMC12422004
Information from pmc.ncbi.nlm.nih.gov
Frequently Asked Questions
Common questions about Bock Nutritionals L-Theanine 200