A Thorne Theanine supplement, in a white bottle with green and blue abstract watercolor artwork on the label, contains 90 capsules of L-theanine to support optimal brain wave function.
A Thorne Theanine supplement, in a white bottle with green and blue abstract watercolor artwork on the label, contains 90 capsules of L-theanine to support optimal brain wave function.

Thorne Theanine

90 count

Why we love it

  • Supports brain function, mood, and cognitive performance.
  • * Made with sustainable and natural ingredients.
  • * Helps to create a natural and healthy calming effect.
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Theanine $64.00

Free carbon neutral shipping on orders $29+. Arrives in 3–5 days. Free, easy 30-day returns.

L-theanine is a unique amino acid that is found almost exclusively in the tea plant (Camellia sinensis) and which has been used safely in Japan for decades. L-theanine has been shown to positively modify brain waves and the key neurotransmitters involved in mood, focus, and memory.

L-theanine enhances the production of the neurotransmitters dopamine and serotonin, and also appears to play a role in the formation of GABA – a neurotransmitter that acts like a "brake" during times of runaway stress.

L-theanine also enhances brain alpha-wave activity, a marker of relaxation.* This effect has been observed to be most pronounced in individuals subjectively feeling the highest levels of stress.

*Note: 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. Consult your physician before adding a dietary supplement to your diet.

One Capsule Contains: L-Theanine* 200 mg.Other Ingredients: Hypromellose (derived from cellulose) capsule, Leucine, Calcium Laurate, Microcrystalline Cellulose.

This product uses Taiyo International's Suntheanine® (L-Theanine). Suntheanine is a registered trademark of Taiyo International, Inc.

*Note: 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. Consult your physician before adding a dietary supplement to your diet.

Take 1 capsule one to three times daily or as recommended by a health-care practitioner.

Grove Values

Wellness, proven and transparent

Thorne began with a biochemist’s vision: supplements should be grounded in clinical research and ingredient integrity. Every formula is made without unnecessary additives, using carefully sourced ingredients that are fully disclosed and traceable. Third-party testing and NSF Certified for Sport® standards ensure each supplement meets the highest bar for families who want to know exactly what they’re putting in their bodies.

A HIGHER STANDARD

Wellness formulas you can trust.

Every wellness product is reviewed by experts and screened for ingredients and materials that align with Grove’s strict standards — so you can feel good about what you and your family rely on to feel your best.

Vetted for ingredient integrity

No artificial colors, flavors, or phthalates — all common in mainstream products

No unnecessary extras

Free from artificial dyes, talc, titanium dioxide, and magnesium stearate

Less plastic, fewer microplastics

Prioritized packaging options that reduce plastic waste and microplastic exposure

Go Beyond Plastic™ and microplastics.

Plastic products break down into microplastics that can affect human health.

Grove Co. is on a mission to reduce plastic in home essentials — for both people and for the planet.

Learn more on the Home Planet blog