All Supplements
L-Theanine vs Vitamin B1 (Thiamine)
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
L-Theanine
Vitamin B1 (Thiamine)
Typical Dosage
100-200mg daily
1.1-1.2 mg daily for adults
Best Form
L-Theanine (Suntheanine)
Thiamine Hydrochloride
Key Benefits
5
5
Evidence Rating
★★★★
★★★★
Best Time
With caffeine for focus, or evening for relaxation
With meals to enhance absorption
L-Theanine Benefits
✓Calm focus without sedation
✓Reduces caffeine jitters when combined
✓Promotes alpha brain waves (relaxed alertness)
✓May improve sleep quality
✓Anxiety reduction
Vitamin B1 (Thiamine) Benefits
✓Energy metabolism support
✓Nervous system health
✓Heart function
✓Cognitive performance
✓Muscle maintenance
Can You Take Both Together?
In most cases, L-Theanine and Vitamin B1 (Thiamine) can be taken together safely. However, always check the interactions section of each supplement and consult a healthcare professional if you take medication.
Which Should You Choose?
Choose L-Theanine if your primary goal is: calm focus without sedation. Choose Vitamin B1 (Thiamine) if your primary goal is: energy metabolism support. Many people take both as they target different aspects of health.
Disclaimer: This comparison is for educational purposes only. Always consult a healthcare professional before starting any supplement.