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Nutriana L-Theanine & Caffeine

Backed by 26 studies

Overall grade based on research across 2 ingredients.

C
54out of 100Grade C
Research evidence score

Weighed against 26 published studies · led by L-Theanine

Worth a look. L-Theanine has real research behind it (20+ studies reviewed), but Caffeine Anhydrous doesn't have enough studies yet.

Based on the ingredients we could read from this scan. A full label may include more — like added sugars, colorings or other ingredients — than we captured here.

How the ingredients work together

Known interactions from published nutrition research — separate from the evidence grade.

Caffeine + L-TheanineWork together

L-theanine smooths caffeine's stimulant edge; trials show improved attention with fewer jitters versus caffeine alone.

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Ingredient breakdown

C
L-TheaninePromotes relaxation without drowsiness
Research direction: Leans supportiveEvidence: 19 studiesDose: 200 mgEvidence strength: Moderate - supportive but mixed
D
Caffeine AnhydrousSupports health outcomes
Research direction: InconclusiveEvidence: 7 studiesDose: 100 mgEvidence strength: Weak - research is split or limited

Missing some ingredients or nutrients?

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This summary describes only the ingredients and the research behind them — it is not a judgment of the product or its marketing. Grades reflect the weight of published evidence cross-referenced against 350M+ research papers. How we grade →

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