Confidence: 100%
B08YJ9QHG2
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 want fewer compromises on formulation quality.
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).
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Caffeine: high-bioavailability form declared (Caffeine Anhydrous). The main limitation is that product name or brand not detected (-1).
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.
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
ℹ Dose is below the optimal range with moderate supporting evidence
This is a limiting factor: Dose is below the ranges usually used for stronger effects. 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
Important label or formulation details that may affect how this product should be interpreted.
There is a formulation caveat worth noting
Product name or brand not detected (-1)
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.
