Support Relaxation and Mental Clarity with Premium USP-Grade L-Theanine
L-Theanine is a unique amino acid naturally found in green tea that is known for promoting relaxation without causing drowsiness. It works by supporting healthy levels of neurotransmitters such as GABA, serotonin, and dopamine, which help maintain a calm and focused state of mind.
Our L-Theanine is USP Grade and sourced as a high-purity powder. This clean, single-ingredient product contains no fillers, additives, or unnecessary ingredients — just pure L-Theanine. It is commonly used to support relaxation, mental clarity, and cognitive performance, especially when combined with caffeine. Many users also take it in the evening to support restful sleep.
This versatile powder allows for flexible dosing and is ideal for those seeking a clean, effective way to support daily calm and focus.
Available Sizes: 100 g and 500 g
As a dietary supplement, take 200 mg with water or your preferred beverage 1 to 3 times daily on an empty stomach, or as directed by a healthcare professional. For best accuracy, we recommend using a precision digital scale.
L-Theanine
Other Ingredients: None
This is a pure, single-ingredient product with no fillers or additives.
Serving Size: 200 mg
Servings Per Container: 500 (100 g) | 2,500 (500 g)
Amount Per Serving:
L-Theanine — 200 mg
*Daily Value not established.
• USP Grade
• 100% pure L-Theanine
• Tested for purity and quality
• No fillers, additives, or unnecessary ingredients
• Packaged in a bag with scoop included
L-Theanine is a unique amino acid found in green tea that has been studied for its ability to promote relaxation without sedation and support cognitive function.
Key Research Findings:
* L-Theanine and relaxation
Juneja, L.R. et al. (1999). L-theanine—a unique amino acid of green tea and its relaxation effect in humans. *Trends in Food Science & Technology*, 10(6-7), 199–204.
Research has shown that L-theanine can promote a state of relaxed alertness without causing drowsiness.
* L-Theanine and cognitive performance
Einöther, S.J. & Martens, V.E. (2013). Acute effects of tea consumption on attention and mood. Current Pharmaceutical Design* 19(34), 1–7.
Studies suggest that L-theanine, especially when combined with caffeine, can support attention and cognitive performance.
* L-Theanine and stress response
Kimura, K. et al. (2007). L-Theanine reduces psychological and physiological stress responses. Biological Psychology, 74(1), 39–45.
Research indicates that L-theanine can help reduce stress-related responses in both mind and body.
* L-Theanine and copper chelation
Wang, F. et al. (2025). L-Theanine Effectively Protects Against Copper-Facilitated Dopamine Oxidation. *PubMed* (PMID: 39499422).
Research shows that L-theanine can bind (chelate) copper and reduce copper-facilitated oxidative damage.
* L-Theanine inhibits copper-facilitated oxidation
Jia, L. et al. (2022). l-Theanine Inhibits (−)-Epigallocatechin-3-gallate Oxidation via Chelating Copper. Journal of Agricultural and Food Chemistry.
This study demonstrated that L-theanine forms a complex with copper, reducing its redox activity and oxidative effects.
* L-Theanine promotes copper excretion and reduces tissue accumulation
Yang, D. et al. (2025). Investigation of the Hepatoprotective Effects of Green Tea Polyphenols and L-Theanine in TX Mice. *Foods*.
In vivo research showed that L-theanine improved copper metabolism, increased copper excretion through urine and feces, and reduced copper accumulation in the liver, kidney, and brain.
Metabolic Research Perspectives:
Within bioenergetic and metabolic research traditions, L-theanine is valued for its ability to support calm focus and balanced neurotransmitter activity. From a low toxin perspective, L-theanine has been shown to bind copper and support its excretion from the body. By helping reduce excess copper — which can contribute to oxidative stress — L-theanine aligns with those seeking to reduce their overall toxic burden while supporting the body’s natural regulatory processes.
Note: This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.
Consult your healthcare professional before use if you are pregnant, nursing, taking medication, or have a medical condition. Keep out of reach of children. Do not use if the bag is damaged, punctured, or the seal is broken.
*Statements made on this website have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
– USP Grade Quality — Pharmaceutical-grade L-Theanine produced to strict standards.
– High Purity — 100% pure with no fillers, additives, or unnecessary ingredients.
– Lab Tested — Verified for purity and quality.
– Clean & Transparent — Single-ingredient product with full traceability.
– Flexible Use — Powder form allows for precise and customizable dosing.
– Trusted Sourcing — Sourced to meet high-quality standards suitable for daily wellness use.
