Theanine

Discover how Theanine can help you stay calm and focused throughout your day—add it to your wellness routine today.

December 5, 2025
Author
Superpower Science Team
Reviewed by
Julija Rabcuka
PhD Candidate at Oxford University
Creative
Jarvis Wang

Key Facts

  • L-theanine is an amino acid found naturally in tea that supports a calm, focused mental state without sedation
  • Works by increasing alpha brain waves and enhancing neurotransmitters like serotonin and GABA involved in stress regulation
  • Supports mental clarity, relaxation, and a healthy stress response — useful for anyone balancing focus with calm

Ingredients

L-theanine, calcium laurate, hypromellose capsule, leucine, microcrystalline cellulose.

Why We Chose This

Thorne's theanine addresses the common challenge of needing focus without jitteriness or anxiety. The 200 mg dose is clinically studied and designed to shift your brain toward a relaxed-yet-alert state — similar to the calm focus many people experience after a cup of tea, but in a consistent, standardized form. This formulation supports your nervous system's natural ability to manage stress while maintaining mental performance, making it practical for work, study, or everyday moments when you need both clarity and composure.

Frequently Asked Questions About Theanine

What is the supporting research for the benefits of theanine?
How do I take theanine?

Take 100-200 mg daily, typically in capsule form with water, adjusting based on your response.

For sleep support, take 200-400 mg about 30-60 minutes before bed to help ease into relaxation.

Can I take theanine with other supplements or medications?

L-Theanine is generally well-tolerated with most supplements, though it may interact with blood pressure medications, sedatives, and stimulants — so check with your healthcare provider before combining. Caffeine supplements should be avoided since they work against theanine's calming effects.

Who might benefit from taking theanine?

Anyone managing stress or seeking mental clarity benefits from theanine's ability to boost calming neurotransmitters like GABA and serotonin. Those struggling with focus, anxiety, or sleep quality find it particularly helpful for supporting relaxation without the drowsiness that other options might bring.

How long does it typically take to notice effects of theanine?

Most people notice theanine's calming effects within 30 to 60 minutes of taking it, with peak effects around the one-hour mark. Individual timing varies based on whether you take it on an empty stomach and personal absorption rates.