L-Theanine

L-Theanine by Xymogen features Suntheanine®, a patented, clinically studied form of L-theanine from green tea, shown to promote alpha brain wave activity and calm, focused alertness without sedation. Supports stress reduction and cognitive performance simultaneously.

$84.00

Suntheanine® is a patented, pharmaceutical-grade L-theanine with 40+ comprehensive studies
Promotes alpha brain wave state, calm, focused alertness without drowsiness
Reduces nervous tension, irritability, and concentration difficulty
Synergistic with caffeine for sustained cognitive performance without jitteriness

Why Catalyst Recommends This

Alpha brain wave promotion through L-theanine is relevant for individuals managing occasional stress, focus challenges, and everyday cognitive demands. Suntheanine® provides a research-validated, pure form of L-theanine.

Suggested Use

Take as directed, typically 1–2 capsules as needed for stress and focus support. Can be taken any time of day, no sedation at standard doses. Works synergistically with caffeine for focus support.

Product Disclaimers

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Keep out of reach of children. Do not use if the safety seal is broken or missing. Store in a cool, dry place out of direct sunlight.

Consult with your healthcare practitioner before using this product, especially if you are pregnant, nursing, under 18 years of age, taking medications, or managing a medical condition.

This formula provides Suntheanine® L-theanine, produced through a patented enzymatic process yielding pure L-theanine (gamma-glutamylethylamide), an amino acid naturally found in green tea leaves that crosses the blood-brain barrier to modulate GABA-A receptor activity, inhibit glutamate receptor excitation, increase serotonin and dopamine levels, and promote alpha brain wave (8–13 Hz) activity associated with relaxed, alert mental states.*

Other ingredients: Capsule (hypromellose and water), microcrystalline cellulose, ascorbyl palmitate, and medium-chain triglyceride oil.