Confidence: 100%
B07Z9K1LM2
View on Amazon →Decision summary
A strong option overall. Its main value comes from evidence quality, but the listed weaknesses are still worth checking…
Best for
People prioritizing high absorption and overall formula quality.
Consider another option if
You need a very specific optimization beyond what the current scoring output captures.
Score breakdown
Tap a module to see what it measures. A 0 can reflect missing disclosure, not just a negative result.
Dosage quality
7.0/10Generally solid dosing
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 product name or brand not detected (-1).
Strengths
Weaknesses
Final verdict
A strong option overall. Its main value comes from evidence quality, but the listed weaknesses are still worth checking before buying.
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
Adequate, but not a key strength: Dose is directionally useful, but not a standout strength. 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.
