L-Theanine

amino acid

Human Trials

Non-protein amino acid found in tea leaves. Studied for calm focus, stress reduction, and sleep quality.

Mechanism

Modulates glutamate and GABA signaling, increases alpha brain wave activity, and attenuates stimulant-induced jitteriness when stacked with caffeine.

Sourcing

Third-party tested brands only
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Thorne

Thorne L-Theanine

Verified
  • NSF Certified
  • cGMP manufactured
  • Third-party tested
  • Clean label
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Momentous

Momentous L-Theanine

Verified
  • NSF Sport certified
  • Clinically dosed
  • Athlete-trusted
  • Subscribe & save
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