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Nutricost Caffeine + L-Theanine
SPECIMEN #NUTRICOS
Verified
EnergyNutricost

Caffeine + L-Theanine

To provide clean, focused energy without the typical caffeine jitters or crash.. The product offers a well-known synergistic blend. Both ingredients are dosed adequately for a starting point. However, for optimal effects or for those with higher tolerance, slightly higher doses of both, especially L-Theanine, would be beneficial.

8.0/10
EXCELLENT

This is a good foundational stack for clean energy and focus.

2 ingredientsCapsules240 servings
We'd recommend this
Evidence
8.0
Dosing
7.0
Synergy
7.5
Analyze My Stack
Whenmorning

For a morning energy boost and sustained focus throughout the day.

Foodeither

Caffeine can be taken with or without food. L-Theanine is also flexible. Taking with food might reduce stomach upset for sensitive individuals.

SafetyAll clear

Do not exceed recommended dosage. Monitor caffeine intake from other sources.

ResearchStrong evidence

Caffeine and L-Theanine are extensively studied for their synergistic effects on cognition and mood.

What We Like

  • Excellent synergy between ingredients.
  • Provides focused energy without jitters.
  • Simple, transparent formula.

Watch Out For

  • L-Theanine dose could be higher for some users.
  • Caffeine dose might be low for high-tolerance individuals.

What We Analyzed

Caffeine + L-Theanine Supplement Facts

Verified Supplement Facts

Every dose checked against clinical research

We analyzed the actual supplement facts panel for this product. Every ingredient dose below was cross-referenced with published clinical trials to determine if it matches what studies actually use.

7 ingredients analyzed2 underdosed

Source: Official product page

Ingredient Breakdown

2 underdosed
Clinical Adequate Underdosed Overdosed|Bar = % of clinical dose
IngredientDoseStatusvs. Clinical
Caffeine Anhydrous8.0
100mgUNDERDOSED
50%
100mg

of 200mg

UNDERDOSED
50%
L-Theanine10.0
100mgUNDERDOSED
50%
100mg

of 200mg

UNDERDOSED
50%
In our database (click to learn more) Not yet reviewed
Other Ingredients(inactive)

Rice flour, gelatin capsule, microcrystalline cellulose, magnesium stearate (vegetable source), silica

Our Analysis

Best For

StudentsProfessionalsAnyone seeking clean energy and focusPeople sensitive to caffeine jitters

Skip This If

Pregnant or nursing womenIndividuals with heart conditionsThose extremely sensitive to caffeine

Time to Feel

Within 30-60 minutes

Value

GOOD

How to take: Consider cycling off caffeine periodically to maintain sensitivity and avoid tolerance buildup. L-Theanine does not require cycling.

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