Comparison
Caffeine vs Theanine
TL;DR
Quick comparison: Caffeine and Theanine have 2 overlapping categories and appear together in 16 products.
- Choose Caffeine if: Caffeine boosts alertness and focus by stimulating the central nervous system, e...
- Choose Theanine if: L-Theanine promotes relaxation without drowsiness, reduces stress, and improves ...
- Take both if: You want comprehensive coverage across 2 shared categories.
565 products
analyzed in our comprehensive supplement database
Source · MoodStack Database (2026)
Side-by-side comparison
| Feature | Caffeine | Theanine |
|---|---|---|
| Type | alkaloid | amino_acid |
| Common Dosage | N/A | 200 mg |
| Best Bioavailability | Caffeine Anhydrous (99%) | L-Theanine (90%) |
| Categories | 3 | 4 |
| Available Products | 0 | 0 |
Caffeine
Theanine
Can you take both?
Yes, Caffeine and Theanine can typically be taken together. In fact, we found 16 products in our database that contain both supplements, suggesting they complement each other well.
Both supplements share 2 common categories, indicating they may work synergistically for similar health goals.
Key differences
Option A
Caffeine
Caffeine boosts alertness and focus by stimulating the central nervous system, enhances physical performance, and may improve mood. It supports metabolism and fat burning, potentially aiding weight management. Coffee, tea, and energy drinks are common sources.
Categories
Common forms
- Caffeine Anhydrous · 99% bioavailability
- Di-Caffeine Malate · 95% bioavailability
- Caffeine (as Green Coffee Bean Extract) · 70% bioavailability
Option B
Theanine
L-Theanine promotes relaxation without drowsiness, reduces stress, and improves focus when paired with caffeine. It supports sleep quality and enhances alpha brain wave activity. Found in green tea and supplements.
Common forms
- L-Theanine · 90% bioavailability
Shared categories
Both Caffeine and Theanine are used for these health goals:
Products with both Caffeine and Theanine
We found 12 products that combine both supplements:
Transparent Labs BULK Pre-Workout
Transparent Labs BULK Pre-Workout
Cafe L-Theanine
Transparent Labs Cognition Nootropic
WORK! - PreWorkout
Gorilla Mind Nootropic
Gorilla Mind Energy Drink
Transparent Labs BULK Black Pre-Workout
Transparent Labs BULK Black Pre-Workout
Transparent Labs LEAN Pre-Workout
Transparent Labs LEAN Pre-Workout
Gorilla Mind Respawn
Frequently asked
What is the difference between Caffeine and Theanine?
Can I take Caffeine and Theanine together?
Which is more popular: Caffeine or Theanine?
Related comparisons & products
Medical disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any supplement regimen.