[email protected] Onsite-Verified by SGS Group Xi'an, Shaanxi, China
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Custom OEM L-Theanine Powder Manufacturer & Factories

Pioneering High-Assay Botanical Isolation, Precision Biotransformation & Turnkey Private Label Formulation for Global Nutraceutical Brands.

Standardized Actives Portfolio

Featured Botanical Extracts & Nutritive Actives

Precision-milled, rigorously verified botanical extracts and nutritional compounds designed for seamless integration into dynamic nootropic, metabolic, and functional beverage blends.

Rhodiola Rosea Extract Powder Salidroside

Rhodiola Rosea Extract Powder (Salidroside 1%-18%, Rosavin) OEM/ODM

Vitamin B3 Niacin Powder 99%

Pure Bulk Food & Feed Grade 99% Vitamin B3 Niacin / Niacinamide Powder

Pure Beet Root Juice Powder OEM

Pure Beet Root Juice Powder (Spray-Dried Functional Beverage Base) OEM

Vitamin C Freeze Dried Mixedberry Powder

Freeze-Dried Mixedberry Natural Vitamin C Powder (Custom Drum Packaging)

Liposomal NMN Powder 50%

Liposomal NMN Powder 50% (High Bioavailability Longevity Active)

Natural Saffron Crocus Sativus Extract

Standardized Saffron Extract Powder 10:1 20:1 (Crocus Sativus Stigma)

Sulforaphane Broccoli Sprout Extract Powder

USDA Certified Sulforaphane 1% 10% Broccoli Sprout Extract Powder

Raspberry Fruit Powder Ellagic Acid

Spray-Dried Water-Soluble Ellagic Acid Raspberry Fruit Raw Material

15+
Years Industry Expertise
99.2%
L-Enantiomeric Purity
US$4.28M
Annual Export Capacity
60+
Export Destination Markets
Industrial Monograph & Quality Engineering

High-Assay L-Theanine: Synthesis Pathways & Quality Assurance

A rigorous examination of optical purity, chiral resolution, heavy metal remediation, and microencapsulation technologies for B2B supply chains.

In modern dietary supplement formulation, L-Theanine (γ-glutamylethylamide) represents one of the most commercially critical non-proteinogenic amino acids globally. Sourced primarily from Camellia sinensis or synthesized via enzymatic fermentation, it operates as an analog to glutamate, crossing the blood-brain barrier to modulate neurotransmitter activity, stimulate alpha wave production (8–12 Hz), and mitigate systemic catecholamine surges without sedation. However, for industrial buyers, procurement directors, and contract formulators, commercial success hinges directly on enantiomeric fidelity, dissolution dynamics, and micro-contaminant elimination.

As an SGS-verified direct manufacturing plant, BKYULA Biotech operates dedicated production lines focused on eliminating D-Theanine contamination (which lacks equivalent neuro-cognitive affinity) through advanced asymmetric enzymatic catalysts and supercritical purification steps. Every batch produced under our roof conforms to USP, EP, and FCC compendial standards, verified by validated in-house High-Performance Liquid Chromatography (HPLC) with chiral stationary phases.

Analytical Parameter Natural Decaffeinated Tea Extract Enzymatic Fermentation Grade (USP/FCC) Standard Synthetic Racemic Grade
Assay (HPLC, Dry Basis) 20.0% – 40.0% (Total Polyphenols) ≥ 98.5% – 99.5% Net Active 98.0% – 99.0% (Mixture)
Optical Enantiomer Ratio 100% L-Theanine (Zero D-form) ≥ 99.0% L-Form (≤ 1.0% D-Form) Racemic (Variable L/D ratio)
Specific Optical Rotation [α] +7.7° to +8.5° +7.8° to +8.8° (c=5 in H2O) Inconsistent (+4.0° to +6.5°)
Solubility Profile Partially clear, slight botanical tint Crystal-clear, rapid cold water dispersion Clear to faint haze
Heavy Metals (Pb, As, Cd, Hg) < 5.0 ppm Combined < 2.0 ppm (ICP-MS Tested) < 10.0 ppm Combined
Regulatory Fitment Clean-Label, EU Novel Food Exempt US GRAS, cGMP, Halal, Kosher Certified Limited functional beverage adoption
Strategic Procurement Analysis

Emerging Trends Shaping Global L-Theanine Procurement

Anticipate supply fluctuations, formulation shifts, and delivery innovations across the next five operational cycles.

1. Synergistic "Clean Energy" & Adaptogenic Blends

Procurement teams are shifting away from standalone amino acid powders toward integrated co-processing. Demand is escalating for premixed masterbatches combining L-Theanine with Rhodiola Rosea (Salidroside), bioactive caffeine, and Sulforaphane to smooth out stimulant-induced nervous tension and deliver sustained cognitive focus.

2. Strict Optical & Chiral Purity Governance

Major retail auditing frameworks across the EU and North America now mandate stereoisomeric batch confirmation. Sourcing directors are strictly enforcing testing protocols to ensure absence of synthetic racemization (D-Theanine ad-mixing), safeguarding brand equity against adulteration alerts and bioavailability claims disputes.

3. Microencapsulation & RTD Beverage Stability

Functional ready-to-drink (RTD) teas and carbonated tonics require active ingredients that withstand thermal pasteurization and acidic pH ranges without precipitation or astringency. Liposomal encapsulation and advanced spray-drying granulation protocols now represent over 35% of all new custom production runs.

Factory Direct Strength

Why Partner with BKYULA Biotech Co., Ltd.

Combining 15 years of extraction excellence, onsite SGS verification, and full-spectrum in-house quality control testing.

Onsite-Verified Manufacturing Facility

Assessed directly on location by SGS Group. Our Xian-based facilities operate multi-function stainless extraction tanks, low-temperature vacuum concentrators, and cleanroom spray drying towers adhering strictly to ISO 9001:2015, ISO 22000, and HACCP protocols.

Dedicated In-House HPLC & Microbiological Labs

Every single batch undergoes stringent internal evaluation before dispatch. Utilizing dual HPLC systems, UV spectrophotometers, clean benches, and microbiological incubators, our release Certificates of Analysis (COA) explicitly report assay, moisture, bulk density, heavy metals, and residual solvents.

Comprehensive OEM & ODM Customization

From custom particle mesh optimization (80 to 200 mesh) and instant cold-water soluble granulates to finished direct-compression tablets, powder sachets, and private-label packaging, our technical team converts your technical specs into commercially deployable batches with low initial MOQs.

Stainless Steel Botanical Extraction Tanks Multi-Function Extraction Tanks
Low Temperature Vacuum Concentrator Vacuum Low-Temp Concentration
High Performance Liquid Chromatography Unit Dual HPLC Assay Verification
Certified Finished Goods Storage Finished Clean-Room Warehouse
Procurement Knowledge Base

L-Theanine Procurement & Manufacturing FAQ

Authoritative technical, commercial, and regulatory answers addressing the primary concerns of supplement formulators and QA managers.

What is the minimum order quantity (MOQ) for custom L-Theanine formulations?
Standard catalog powdered grades of raw L-Theanine start from an accessible 1 kg for pilot testing and clinical bench-scale trials. For customized particle mesh milling (e.g., 200-mesh ultra-fine), specialized agglomeration, or multi-component bulk dry-blending with companion actives (such as Vitamin B-complex or botanical extracts), our standard production line batch MOQ typically begins at 25 kg (one standard fiber drum).
How does BKYULA Biotech chemically differentiate between L-Theanine and D-Theanine?
Standard UV or non-chiral reverse-phase HPLC cannot distinguish between L- and D-enantiomers because they exhibit identical molecular weights and standard retention behaviors. In our quality control laboratory, we utilize chiral-stationary-phase HPLC columns (such as cyclodextrin- or crown ether-based stationary media) coupled with specific optical rotation measurements using automated polarimeters. This confirms stereospecific purity (>99% L-enantiomer) with every shipment.
What regulatory documentation and compliance dossiers accompany our purchase orders?
Each commercial shipment is accompanied by a batch-specific Certificate of Analysis (COA) containing assay results, physical property profiles (loss on drying, bulk and tapped density), ICP-MS heavy metal screen (Pb, As, Cd, Hg), and microbial plate counts. Furthermore, we supply full technical dossiers upon qualification, including Technical Data Sheets (TDS), Safety Data Sheets (SDS/MSDS), Allergen Declarations, Non-GMO Statements, BSE/TSE-Free Certificates, and copies of our ISO 9001:2015, ISO 22000, HACCP, Kosher, and Halal factory credentials.
Can you assist with water solubility issues in functional RTD beverage formulations?
Yes. While pure L-Theanine is intrinsically water-soluble, standard crystal grades can require prolonged agitation or leave optical cloudiness in high concentrations. BKYULA Biotech manufactures an agglomerated, instantized, cold-water-dispersible grade that dissolves completely in under 15 seconds without foaming or thermal requirements. We also offer liposomal encapsulation technologies for high-acidic, pasteurized RTD beverage canning.
What international shipping terms (Incoterms) and payment gateways are supported?
With third-party verified annual export volumes exceeding US$4.28M across North America, South America, Europe, and Southeast Asia, we support FOB, CFR, CIF, EXW, CIP, FCA, CPT, and comprehensive DDP (Delivered Duty Paid, air and ocean freight) handling all customs duties directly to your loading dock. Accepted settlement currencies include USD, EUR, and GBP via T/T wire transfer, Letters of Credit (L/C), D/P, PayPal, and major corporate credit cards.

Request Technical Dossiers, Bulk Quotations & Pilot Samples

Accelerate your next product launch. Speak with our manufacturing chemical engineers to receive customized assay specifications and test samples.

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