Nootropic
Caffeine + L-Theanine
Also known as: Smart caffeine, Focused energy stack
A
Evidence
Classic synergistic stack for focused energy. L-theanine smooths caffeine's rough edges.
Primary uses
- Focus
- Energy
- Calm alertness
- Productivity
How it works
- Caffeine provides alertness
- L-theanine promotes calm alpha waves
- Synergistic smooth focus
Dosage
- Typical range
- 100mg caffeine + 200mg L-theanine (1:2 ratio)
- Timing
- Morning or before work
- With food
- Optional
- Duration
- Safe long-term
- Special populations
- Productivity, focus needs
Forms
- Combined capsules
- Separate
Safety
Common side effects
- Less than caffeine alone
Contraindications
- Caffeine contraindications
Evidence notes
Well-studied synergistic combination
Grade A: Multiple well-designed human trials support the main claims.
Related in Nootropic
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Open the checkerMedical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.