Confidence: 95%
B07QD2GTCT
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Decision summary
A middling option. It may be usable, but weaker dosing makes better alternatives worth comparing.
Best for
People prioritizing high absorption and overall formula quality.
Consider another option if
You care a lot about label clarity and want fewer unknowns.
Score breakdown
Tap a module to see what it measures. A 0 can reflect missing disclosure, not just a negative result.
Dosage quality
4.0/10Dosing looks weaker than ideal
Checks whether labeled ingredient amounts fall within clinically studied ranges (not just regulatory minimums). Low/0 can reflect under-dosing or missing amounts (e.g., proprietary blends).
Explore next
Theanine: high-bioavailability form declared (L Theanine). The main limitation is that phosphatidylserine: chemical form not specified on label.
Strengths
Weaknesses
Final verdict
A middling option. It may be usable, but weaker dosing makes better alternatives worth comparing.
A closer look at the main ingredients, how they influence the score, and the supporting evidence when available. Tap any ingredient to expand.
⚠ Moderate evidence exists, but dose is above the upper dose range
Dose is above the upper dose range. This is a limiting factor: Dose is higher than typically recommended ranges. The declared form supports strong absorption.
Scientific evidence
Owen et al. RCT theanine and caffeine on cognitive performance
Nutritional Neuroscience • 2008
PMID: 18681988.0
Lu et al. RCT L-theanine and stress response in healthy adults
Nutritional Neuroscience • 2004
PMID: 16930802.0
ℹ At the minimum effective range, but below the optimal dose with moderate supporting evidence
Dose meets the minimum effective range, but is below the optimal dose used for stronger effects. This is a limiting factor: Dose is below the ranges usually used for stronger effects. The label does not specify the form, so absorption quality cannot be verified.
Scientific evidence
Richter et al. meta-analysis PS supplementation and cognition in older adults
Journal of Clinical Biochemistry and Nutrition • 2013
PMID: 24983586.0
Evidence inferred from established knowledge, not directly linked studies
Adequate, but not a key strength: Clinical dosing guidance is limited for this ingredient.
No supporting studies or dosing references are currently available for this ingredient.
Important label or formulation details that may affect how this product should be interpreted.
Phosphatidylserine form is not clearly declared
Exact ingredient form is not disclosed on the label.
Read our methodology overview to understand how SuppScoreLab combines multiple scientific dimensions into one practical score.
View methodology →This evaluation is based on the product label and declared Supplement Facts available at review time. It does not verify laboratory-tested composition, purity, or batch-level quality. This content is educational and not medical advice. Consult a qualified healthcare professional for personal health decisions. Affiliate disclosure: SuppScoreLab may earn a commission from qualifying Amazon links.
See the best Theanine supplements ranked with the same methodology, or keep exploring the database.
