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Green Tea Extract L-Theanine 98%
What is L-Theanine?
L-theanine is a unique amino acid found almost exclusively in green tea (Camellia sinensis), where it is responsible for the calming yet alert character of tea drinking. Chemically it is gamma-glutamylethylamide, also described as N-ethyl-L-glutamine (CAS 3081-61-6, molecular formula C7H14N2O3). The L-isomer is the biologically active form. KH Health supplies L-theanine 98% bulk powder derived from green tea through extraction, purification, and crystallization, offering brands a naturally sourced alternative to synthetic theanine.The finished product is white crystalline powder with uniform texture, no agglomeration, pure umami taste, no peculiar smell. The solution is clear and colorless with a transmittance of ≥98%, belonging to food & cosmetic dual-grade high-purity raw material .
We can also offering：
Fermented L-Theanine
Synthetic L-Theanine
Why Source L-Theanine from a Certified Supplier?
As an L-theanine supplier and theanine manufacturer, KH Health verifies every lot for assay by HPLC and confirms L-isomer identity by optical rotation, so finished-product makers can dose with confidence. Our bulk powder is white, crystalline, highly water soluble, and heat stable, which is why stress, sleep, and nootropic brands choose it for capsules, gummies, and beverages alike. Supply comes from an FSSC 22000, Kosher, Halal, and SC certified facility in Xi'an, Shaanxi, China, with per-batch COA and full export documentation.
Product benefits
Our 98% high-purity L-Theanine is efficiently absorbed by the human body, can cross the blood-brain barrier quickly, and exerts multiple physiological activities. All benefits are supported by scientific research literature and clinical trials.
1 Promotes Calm Relaxation Without Drowsiness
L-Theanine effectively increases human brain alpha waves, which are closely associated with relaxed and focused mental states. It relieves daily tension, anxiety and emotional irritability caused by work and life pressure. Different from sedative ingredients, it will not cause drowsiness, dizziness or fatigue, realizing a unique state of "calm alertness" .
2 Enhances Cognitive Focus & Memory
It regulates brain neurotransmitter secretion, improves selective attention and reaction speed, and optimizes cognitive performance. Clinical trials show that combined with caffeine, it can significantly reduce mental fatigue, improve work and study efficiency, and assist in improving memory of people with mild cognitive impairment .
3 Improves Sleep Quality Naturally
By relieving nerve tension and stress-induced excitement, it shortens sleep latency, stabilizes sleep state, reduces nighttime awakening frequency, and improves overall sleep quality. It has no dependence or side effects, safer than chemical sleep aids, and effectively improves sleep disorders caused by anxiety .
4 Regulates Physical Health & Anti-Aging
It assists in regulating blood pressure and blood sugar balance, protects cardiovascular health, and reduces oxidative damage of free radicals. It has excellent anti-aging and radiation protection effects, can enhance body immunity, and reduce the side effects of chemotherapy drugs to a certain extent .
5 Optimizes Taste & Extends Shelf Life
As a natural umami substance in green tea, it can neutralize the bitter taste of caffeine and polyphenols in functional foods and beverages, improving taste texture. Meanwhile, it acts as a natural antioxidant and preservative to extend product shelf life .
Product applications
1. Stress & Calm Daily Supplements
Everyday stress management is a mainstream supplement category, and consumers increasingly prefer non-sedating, plant-derived actives over harsh calming ingredients.
L-theanine powder doses cleanly into capsules, tablets, and chewable blends with ashwagandha, lemon balm, or magnesium in calm formulas.
HPLC-verified 98% assay and L-isomer confirmation give stress-relief brands a measurable, documentable active for honest label claims.
2. Sleep Support & Evening Blends
Sleep aids are moving toward gentler, plant-based combinations as consumers look for bedtime support without next-day grogginess.
Theanine complements melatonin, GABA, glycine, and traditional botanicals such as jujube seed in evening capsules, gummies, and drink powders.
3. Cognitive Focus & Nootropic Formulas
The nootropic segment continues to grow, with the caffeine-plus-theanine combination one of the most evidence-backed pairings for focus and alertness.
The 2:1 to 1:1 theanine-caffeine ratio blends easily into morning capsules, drink sticks, and RTD shots alongside B vitamins and citicoline.
4. Functional Beverages & Relaxation Drinks
Beverage brands are reformulating toward calm-energy and relaxation positioning, creating demand for water-soluble actives that survive hot or cold processing.
L-theanine dissolves readily in tea drinks, sparkling water, and powder sachets with neutral taste, and remains stable across standard beverage processing.
Heat-stable, clean-tasting, and fully documented L-theanine gives beverage R&D teams a reliable functional ingredient with a natural green tea story.
Why choose us？
- Customized Processing Service: We support OEM/ODM customized services such as personalized packaging, fineness adjustment and formula compounding to meet diverse customer needs .
- Stable Supply Capacity: Monthly production capacity up to 5000KG, sufficient inventory, support small batch trial order and large batch bulk order, timely delivery .
- Full Set of Document Support: It provides commercial invoice, packing list, CO certificate, health certificate and all customs clearance documents to support global customs clearance.
- Professional Technical Support: Equipped with professional R&D and technical team, provide formula guidance, product application solutions and after-sales technical consultation.
- Strict Quality After-sales: Unified batch standard for bulk goods, if there is any quality problem, support unconditional return and exchange, zero risk procurement.
- Global Logistics Service: Cooperate with mature international logistics channels, support sea, air and express delivery, fast and safe transportation.
customer case
Confidential — North American Mood and Sleep Brand
A North American brand launching a daytime calm-and-focus line required a naturally sourced theanine with a verifiable L-form basis after a previous supplier could not document isomer purity. Our green tea-derived 98% grade passed their COA review on the first audit, and the crystalline powder blended cleanly into both capsules and a dissolvable drink stick. The brand now sources on a recurring quarterly schedule across two SKUs.
A North American brand launching a daytime calm-and-focus line required a naturally sourced theanine with a verifiable L-form basis after a previous supplier could not document isomer purity. Our green tea-derived 98% grade passed their COA review on the first audit, and the crystalline powder blended cleanly into both capsules and a dissolvable drink stick. The brand now sources on a recurring quarterly schedule across two SKUs.
fAQ
Q1: What is the purity standard of your L-Theanine 98%? Can it provide HPLC test report?
A: Our product purity is strictly controlled between 98%, tested by high-performance liquid chromatography (HPLC). Each batch is equipped with official HPLC purity test report, SGS safety report and heavy metal detection report, supporting customer inspection and market filing .
Q2: Is this L-Theanine natural green tea extracted or synthetic?
A: It is 100% natural green tea leaf extract, extracted from organic green tea raw materials through physical low-temperature purification process, no chemical synthesis ingredients, no additives, pure natural and safe, superior to synthetic L-Theanine in activity and safety .
Q3: What are the advantages of your product compared with other suppliers?
A: First, raw materials are selected from high-quality young tea leaves with higher natural L-Theanine content; second, low-temperature extraction technology retains maximum active ingredients with stable batch quality; third, complete international certifications meet global market access standards; fourth, factory direct sales eliminate middlemen, with cost-effective price and stable supply capacity.
Q4: What is the MOQ and delivery time?
A: The minimum order quantity is 1KG, supporting small batch trial orders. Conventional inventory products can be delivered within 3-5 working days, and bulk orders of more than 1 ton can be delivered within 7-10 working days, with sufficient monthly production capacity to support large orders .
Q5: Is the product suitable for food and cosmetic production?
A: Yes. Our L-Theanine 98% is food and cosmetic dual-grade raw material, compliant with FDA, EU and international food safety standards. It has low impurity, high safety and wide applicability, fully meeting the production requirements of health supplements, functional foods and skin care products .
Q6: How to store the product to extend shelf life?
A: It should be stored in a sealed, dry, cool and ventilated environment, avoiding high temperature, humidity and direct sunlight. The shelf life is 24 months under standard storage conditions. It is recommended to seal and store in time after opening the package to avoid moisture absorption and agglomeration.
Q7: Does L-Theanine have side effects and dependence?
A: As a natural amino acid in green tea, L-Theanine has excellent safety, no toxic side effects and no drug dependence after long-term regular use. It will not cause drowsiness or addiction, and is safe for long-term addition in health products and foods .
For any questions or assistance regarding green tea extract powder 98% L-Theanine,feel free to contact us via:
Email: sales@kh-health.com
WeChat: +86 13096987266
WhatsApp: +86 18792880979
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