Confidence: 84%
B09PK3JJN7
View on Amazon →Decision summary
A solid product, but not a clean win. The main trade-off is weaker dosing.
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
6.7/10Acceptable dosing, but not standout
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: dose within clinically studied range (evidence A). The main limitation is that calcium: below clinically studied range.
Strengths
Weaknesses
Final verdict
A solid product, but not a clean win. The main trade-off is weaker dosing.
A closer look at the main ingredients, how they influence the score, and the supporting evidence when available. Tap any ingredient to expand.
✔ Clinically effective dose with moderate supporting evidence
A clear strength: Dose is strong and within effective 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 Evidence is strong, but dose is below the optimal range
This is a limiting factor: Dose is below the ranges usually used for stronger effects. The declared form supports strong absorption.
Scientific evidence
McLellan et al. systematic review caffeine and alertness
Nutritional Neuroscience • 2016
PMID: 26677204.0
Warren et al. meta-analysis caffeine and strength performance
Journal of Strength and Conditioning Research • 2010
PMID: 22840561.0
⚠ Strong evidence exists, but dose is below effective threshold
A clear drag on the formula: Dose is likely below clinically useful levels. The label does not specify the form, so absorption quality cannot be verified.
Scientific evidence
Tang et al. meta-analysis calcium supplementation and fracture risk
BMJ • 2007
PMID: 17720017.0
Important label or formulation details that may affect how this product should be interpreted.
Calcium dose looks below clinically effective levels
Declared amount falls below ranges used in human trials.
Calcium 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.
