Meta Information

ID:caffeine-l-theanine

Name:Caffeine and L-Theanine

Schema Version:1.5

Alternate Names

• Caffeine Theanine Stack
• Smart Caffeine

Active Compound

Caffeine, L-Theanine

Intervention Type

synergistic_therapy

Delivery

Route:

oral

Scope:

• systemic

Regulatory Status

• us:dietary_supplement
• us:gras

Indication

Focus:

healthspan

Description:

To enhance cognitive function, focus, and alertness while mitigating the jitteriness and anxiety commonly associated with caffeine consumption alone.

Typical Protocol

• Consume 100mg of caffeine with 200mg of L-theanine as needed for cognitive enhancement, typically in a 1:2 ratio.
• Avoid consumption within 8 hours of bedtime to prevent significant disruption to sleep architecture.

Expected Cost Mean

Low Cost:

10

High Cost:

25

Cost Type:

monthly

Description:

Cost for daily use of bulk powders or combined capsules; not insurance covered.

Summary

This combination leverages the synergistic effects of a stimulant (caffeine) and a calming amino acid (L-theanine). Caffeine blocks adenosine receptors to increase alertness, while L-theanine increases alpha brain waves, promoting a state of relaxed focus. Together, they improve cognitive performance, attention, and mood more effectively than either compound alone, supporting cognitive healthspan by enhancing mental acuity.

Purpose

Synergistic nootropic stack for enhanced focus and calm alertness.

Card Summary

A popular nootropic combination that pairs caffeine's alertness with L-theanine's calming effects for smooth, focused energy without the jitters.

Drug Class

null

Drugs In Class

Empty Array

Impact

Score:

4.5

Justification:

Provides targeted cognitive enhancement but lacks direct impact on primary aging hallmarks.

Evidence

Grade:

A

Score:

8.5

Justification:

Multiple human RCTs confirm synergistic effects on attention, alertness, and task switching.

Safety

Score:

2.5

Justification:

Both compounds are GRAS with high safety profiles at typical dosages.

Flags

• Caffeine can significantly disrupt sleep architecture; avoid use late in the day.
• High doses may cause anxiety, heart palpitations, or digestive issues.
• Risk of caffeine dependence, tolerance, and withdrawal symptoms exists with regular use.
• Individuals with CYP1A2 gene variants may metabolize caffeine slowly, increasing side effect risk.

Verdict

A safe, effective stack for acute cognitive enhancement and focused productivity.

Qualifier

route: oral, scope: systemic, focused on healthspan. Highlight the nootropic synergy.

Created

2026-04-30T01:41:56.891192Z

Ai Model

Gemini 2.5 Pro (High)