Green Tea Leaf Extract Powder

Green Tea Leaf Extract powder is a concentrated ingredient sourced from the leaves of the Camellia sinensis (L.) plant. It is standardized to contain the plant's most beneficial compounds, including polyphenols and L-theanine. Within its polyphenol content, you'll find potent antioxidants known as catechins, particularly EGCG, which is well-regarded for its properties. This extract is a versatile choice for products across dietary supplements, functional foods, and personal care.

The Right Partner for Your Tea Extract Needs：

• Low-Temp Extraction: Modern, non-high-temperature process protects heat-sensitive compounds like EGCG, guaranteeing maximum bioactivity and stability.
• Guaranteed Potency: Standardized and customizable levels of polyphenols, catechins, EGCG, and L-theanine for precise formulation.
• Global Compliance: cGMP-certified production with rigorous third-party testing for heavy metals, pesticides, and microbes.
• Full Documentation: Comprehensive support with COAs and MSDSs for smooth global market entry.
   

EGCG (Epigallocatechin Gallate)

The dominant and most bioactive catechin in green tea leaf extract. EGCG accounts for 50–80% of total catechin content in well-processed extract.

Molecular Formula: C₂₂H₁₈O₁₁

Mechanism: Inhibits COMT enzyme (catechol-O-methyltransferase), modulates AMPK pathway, exhibits direct free radical scavenging activity

Stability: Sensitive to alkaline pH, heat above 80°C, and oxidation. Stable in dry powder form under nitrogen packaging

EGC, ECG, and EC

The three secondary catechins present alongside EGCG. Each has distinct bioavailability and metabolic profiles. High-catechin specifications (≥80%) include meaningful concentrations of all four major catechins, not just EGCG.

Caffeine

Naturally present in Camellia sinensis leaf at 2–4% of dry weight. In standard extract grades, caffeine is retained at ≤5%. Decaffeinated grades reduce this to ≤0.5% - relevant for stimulant-sensitive formulations, children's products, and markets with caffeine labeling requirements.

Theanine

Present in whole leaf but largely removed during polyphenol-focused extraction. Formulators targeting combined EGCG + L-theanine effects should specify a separate L-theanine ingredient rather than expecting meaningful theanine retention in a polyphenol-standardized extract.

Green tea extract production involves many steps:
1. Preparing raw ingredients: Clean fresh green tea shoots and leaves to remove contaminants. Drying and pulverizing reduce moisture and increase the extraction surface.
2. Extraction: Tea leaves are extracted for active compounds using methods like:
Solvent extraction uses water or ethanol at a controlled temperature and time.
SFE: Effective, solvent-free chemical extraction utilizing supercritical carbon dioxide.
Microwave-Assisted Extraction: Faster active component dissolution.
3. Filtration and centrifugation: remove solids from the crude extract. Macroporous resin adsorption or membrane separation may isolate and concentrate active compounds.
4. Concentration and Drying: Low-pressure concentration removes solvent from purified extract. Spray drying turns concentrated liquid into fine green tea extract powder.
5. Quality Control: Raw materials and finished products are tested for quality. Pesticide residues, heavy metal content, moisture levels, and essential active ingredient concentrations (e.g., tea polyphenols, caffeine) are tested to ensure the extract meets quality standards.

Antioxidants' impact

In vitro, green tea polyphenols, notably EGCG, are antioxidants. These compounds can fight ROS and other free radicals, protecting lipids, proteins, and DNA.

Potential Anticancer Effects

Green tea may cut prostate cancer risk, according to epidemiological studies. EGCG, a major catechin in green tea extract, inhibits cancer cell proliferation and promotes apoptosis in vitro and preclinically. The results are intriguing, but more thorough clinical trials are needed to show anticancer efficacy in humans.

Cardiovascular System Effects

Green tea catechins have many cardiovascular advantages, according to preclinical and clinical investigations. These routes reduce oxidative stress, modulate lipid metabolism (lowering LDL cholesterol), improve endothelial function, reduce inflammation, decrease vascular smooth muscle cell proliferation, and may have anti-thrombotic effects.

Neuroprotective Potential:

Preclinical research suggests multiple neuroprotective mechanisms for green tea polyphenols. Antioxidants, chelation of dementia-causing metal ions, intracellular signaling pathway control, and protein kinase regulation are examples. Their clinical efficacy in neurodegenerative disease prevention and treatment needs more study.

Anti-Ultraviolet (UV) Effects

In vitro studies demonstrate that tea polyphenols inhibit UVB-induced retinal pigment epithelial cell damage. The proposed routes boost Survivin gene expression and minimize mitochondrial dysfunction and DNA damage. These discoveries may prevent UV-induced cellular damage, but in vivo research is needed.

Potential Anti-Obesity and Metabolic Effects

In animal models of high-fat/Western diet-induced obesity and metabolic syndrome, EGCG may reduce obesity-related symptoms and fat accumulation. This may be due to EGCG's ability to reduce fat absorption and alter inflammatory cytokines. These discoveries require human clinical studies.

Anti-Caries Potential:

Research suggests that green tea extract may reduce tooth matrix degradation by matrix metalloproteinases (MMPs). This may decrease tooth corrosion and attrition.

Antibacterial and Antiviral Properties:

Green tea extracts are antibacterial and antiviral, including against MRSA in vitro. Labs show tea polyphenols inhibit influenza, rotavirus, SARS-CoV, and HPV. The therapeutic value and efficacy of these effects in vivo need further study.

Nutraceutical and Dietary Supplement Industry:

Green tea extract is a well-established ingredient in the nutraceutical market, primarily valued for its potent antioxidant properties. It is incorporated into a diverse range of dietary supplements, including capsules, liquids, and powders, often positioned to support healthy blood glucose and blood pressure levels, aid in weight management, contribute to overall wellness, and potentially assist in recovery following physical activity.

Cosmetics and Personal Care Industry:

In the cosmetics and personal care sector, green tea extract is utilized for its antioxidant and potential anti-inflammatory properties, aiming to mitigate oxidative stress associated with skin aging. It is found in formulations such as bath products, massage oils, facial cleansers, lotions, and masks. Furthermore, research suggests potential benefits in addressing certain skin conditions like dermatitis, rosacea, warts, and acne, as well as improving skin elasticity and offering a degree of photoprotection against solar-induced damage.

Food and Beverage Industry:

Green tea extract finds application in the food and beverage industry for various functional purposes. These include enhancing flavor profiles, preserving food color and extending shelf life through its antioxidant properties, deodorizing certain food products, potentially aiding in detoxification processes, and contributing to the development of innovative food packaging materials (e.g., gels). It may also serve as a processing aid in specific food manufacturing processes.

Pharmaceutical and Biomedical Research:

Green tea extract and its constituents are subjects of ongoing research within the pharmaceutical and biomedical fields, particularly concerning their potential anti-inflammatory and weight management effects. Preclinical studies are exploring their therapeutic potential in various disease models, warranting further investigation into clinical applications.

 

 

 

Daily Chemical and Household Products:

Various daily chemical products contain antibacterial and anti-inflammatory green tea extract. Mouthwashes, deodorants, dishwashing liquids, air fresheners, toothpaste, soaps, and talcum powders strive for usefulness.

Sunscreen and Photoprotective Products:

Green tea extract absorbs UV light, suggesting photoprotection. Thus, sunscreens contain it to prevent UV damage.

Natural Colorant Applications:

Food and confectionery manufacturers can employ green tea extract's natural pigments as direct colorants. Lipsticks and hair colors use these pigments to naturally enhance color.

Fragrance Industry:

Green tea extract gives perfumes like Bulgari's Green Tea a fresh, natural touch.

 

Comparison: Green Tea Extract Grades and Source Forms

One of the most common sourcing mistakes is treating all green tea extract as interchangeable. Here's a direct comparison of the main commercial forms :

Parameter	Spray-Dried Tea Liquor	Standard Extract (40% Polyphenols)	High-Purity EGCG (≥90%)	Organic Extract
EGCG Content	5–15% (variable)	25–35%	≥90%	25–35%
Polyphenol Accuracy	UV only (often overstated)	HPLC-verified	HPLC-verified	HPLC-verified
Purification Step	None	Resin adsorption	Crystallization / column	Resin adsorption
Caffeine	3–6% (uncontrolled)	≤5% (declared)	≤2%	≤5%
Heavy Metal Risk	Higher (no soil testing)	Controlled (ICP-MS)	Controlled (ICP-MS)	Controlled (ICP-MS)
Batch Consistency	Low	High	High	High
Cost per Active Unit	Appears low; poor value	Most efficient	Premium; justified for high-EGCG claims	Moderate premium
Best Application	Food flavoring only	Supplements, functional food	Premium supplements, cosmeceuticals	Clean-label, EU/US organic

The key insight: spray-dried tea liquor is not a standardized extract. It lacks the purification steps that concentrate and verify active compound content. Using it in a labeled supplement product creates label claim liability .

 

Why Choose Jiuyuan Biotech?

13+ Years of Manufacturing Expertise

• Specialized in botanical extracts with mature production systems and global supply experience.

Advanced Production Capacity

• 6 workshops, 10 automated lines, and 6,000+ tons annual output ensure stable and scalable supply.

Strict Quality Control

• Full compliance with cGMP, HACCP, ISO22000, FSSC22000, KOSHER, and HALAL standards, supported by comprehensive COA, MSDS, and traceability documents.

R&D-Driven Customization

• A dedicated 12-member R&D team offering tailored specifications including polyphenols, EGCG, catechins, mesh size, and formulation needs.

Reliable Raw Material & Safety Assurance

• Controlled sourcing, low-temperature extraction, and third-party testing for heavy metals, pesticides, and microbial safety.

Global Export Experience

• Long-term supply to Europe, North America, and Asia with professional support for documentation, registration, and logistics.

 

Delivery Methods

By Air 100 kg- 1000 kg, 5-7 Days Airport-to-airport service professional clearance broker needed	By Sea Over 300 kg, Around 30 Days Port-to-port service professional clearance broker needed	Express Under 100kg, 3-5 Days Door-to-door service easy to pick up the goods

 

Packaging Arrangement

Material: Products will be packaged in durable cardboard boxes/wooden crates/plastic containers (depending on customer requirements) for transit protection. Durable and moisture-resistant packing prevents damage. Labeling: Product name, amount, weight, and destination address will be accurately labeled on each package. Any barcodes or tracking numbers you need will be included. Customization: Please let us know if you need unique designs or protective packing. We can personalize packaging for you. Weight and Dimensions: Space and weight will be optimized in the packing. We'll tell you each package's weight and dimensions before shipping. Please inform us of any logistics or packaging preferences. Our goal is safe and fast delivery of your items.

Q1: What is the difference between total polyphenols, total catechins, and EGCG - and which should I specify?

These are three nested measurements of the same extract, each more specific than the last. Total polyphenols includes all phenolic compounds - catechins, flavonols, phenolic acids, and others. Total catechins measures the four main catechins (EGCG, EGC, ECG, EC) as a group. EGCG is the single most bioactive catechin and the compound most referenced in clinical literature .

For supplement label claims, specify EGCG content verified by HPLC. A product labeled "500 mg green tea extract standardized to 50% polyphenols" may contain only 20–25% EGCG - a meaningful difference for efficacy and label claim accuracy.

Q2: Why does your decaffeinated grade still show ≤0.5% caffeine rather than 0%?

Complete caffeine removal from green tea extract is technically impractical without degrading catechin content. The ≤0.5% residual caffeine in our decaffeinated grade is the industry-standard threshold for "decaffeinated" botanical extracts and is consistent with FDA and EU food labeling conventions. At typical supplement serving sizes (200–500 mg extract), this represents less than 2.5 mg caffeine - negligible for virtually all consumer populations.

Q3: Is green tea extract safe at high EGCG doses?

EGCG has a well-documented safety profile at doses used in conventional supplements (typically 200–800 mg EGCG/day). The European Food Safety Authority (EFSA) issued a scientific opinion in 2018 noting that EGCG intakes above 800 mg/day from supplements may be associated with elevated liver enzyme signals in some individuals . This is a dose-dependent concern relevant to ultra-high-potency products, not standard supplement formulations. We recommend formulators review the EFSA opinion and applicable market regulations when designing high-EGCG products.

Q4: How do you handle batch-to-batch consistency for EGCG content?

Consistency starts with raw material control. We test every incoming leaf lot for baseline catechin content and reject lots below our minimum threshold. During production, inline UV monitoring tracks polyphenol concentration in real time. After spray drying, HPLC analysis on the finished powder confirms the specification before any batch is released. Retained samples allow us to investigate any discrepancy identified by client third-party testing - a situation we take seriously and respond to within 48 hours.

Q5: Can I get an organic-certified grade for EU market entry?

Yes. We hold both USDA NOP and EU Organic certifications. Organic-grade green tea leaf extract powder ships with the corresponding organic transaction certificate. Note that organic grades are typically available at polyphenol specifications up to 50% due to the absence of synthetic processing aids. For higher polyphenol concentrations, conventional grades with full pesticide residue documentation are the practical alternative.

Q6: What is the shelf life, and how should bulk powder be stored?

Under recommended storage conditions - sealed packaging, ≤25°C, ≤60% RH, away from direct light - our green tea leaf extract powder maintains specification for 24 months. Nitrogen-flushed packaging is standard for all shipments. Once opened, reseal immediately and store under the same conditions. Catechins oxidize rapidly when exposed to air and moisture; opened drums should be consumed within 30 days or resealed under nitrogen.

Q7: Do you offer white-label or private-label documentation support?

Yes. For clients operating under their own brand identity, we provide neutral-label packaging and white-label COA formatting. NDA and confidentiality agreements are standard practice for all client relationships. We do not disclose client identities or formulation details to third parties under any circumstances.

Q8: How does your pricing compare to other Chinese suppliers?

We're not the cheapest option in the market, and we don't try to be. Our pricing reflects HPLC-verified specifications, ICP-MS heavy metal testing, third-party pesticide residue analysis, and genuine cGMP manufacturing - not spray-dried tea liquor with a polyphenol claim based on UV spectrophotometry. Clients who've experienced a failed third-party audit or a regulatory inquiry from a retailer tend to understand the cost difference quickly. We're happy to provide a detailed quote alongside our full documentation package so you can make a direct comparison.

Jiuyuan Biotech supplies green tea leaf extract powder to supplement formulators, contract manufacturers, and brand owners across 30+ countries. Our technical team can advise on specification selection, formulation compatibility, decaffeination options, and regulatory documentation for your target market.

Contact us to receive:

Batch-specific COA and MSDS

1 kg R&D sample (shipping cost applies)

Pricing for standard, high-purity, decaffeinated, and organic grades

Third-party pesticide and heavy metal test reports

Factory audit scheduling (in-person or live video)

📧 info@jiuybiotech.com | 🌐 www.jiuyuanbio.com