Feature
L-Theanine
Iodine
Typical Dosage
100-200mg daily
150 micrograms daily for adults
Best Form
L-Theanine (Suntheanine)
Potassium iodide
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
Iodine Benefits
✓Supports thyroid hormone production and function
✓Essential for cognitive development and brain health
✓Promotes healthy metabolic rate and energy levels
✓Supports reproductive health and foetal development
✓Aids immune system function and antioxidant defence
Can You Take Both Together?
In most cases, L-Theanine and Iodine 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 Iodine if your primary goal is: supports thyroid hormone production and function. 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.