Purestar Chem Enterprise Co., Ltd
Green Tea Extract (Polyphenol, Catechins, EGCG)
English Name: Green Tea Extract, Green Tea Extract powder
Latin Name: Camellia sinensis (L.) Kuntze
Plant Part Used: Leaf
Product Form: Powder
Main Components: Tea polyphenols, catechins, EGCG, L-theanine
Active Ingredients: L-theanine 20%-98%, EGCG 50%-99%, Tea Polyphenols 40%-95%, Catechin 20%-85%
L-theanine: CAS No. 3081-61-6
EGCG (Epigallocatechin Gallate): CAS No. 989-51-5
Catechins: CAS No. 154-23-4 (Catechin), CAS No. 490-46-0 (Epicatechin)
Tea Polyphenols: Polyphenolic mixture derived from green tea (no single CAS number)
Appearance: Yellow to light brown fine powder
Solubility: Dispersible in water under typical formulation conditions
Hygroscopicity: May absorb moisture under humid conditions; dry storage recommended
Test Methods: UV, HPLC
Quality System: ISO certified, KOSHER and HALAL available
Description:
Green tea extract is a highly concentrated botanical ingredient obtained from the leaves of Camellia sinensis, carefully processed to preserve naturally occurring compounds such as tea polyphenols, catechins, EGCG, and L-theanine. As one of the most widely recognized plant-derived ingredients in the global nutraceutical and functional food industry, green tea extract powder is valued for its standardized composition, excellent formulation versatility, and broad application potential in dietary supplements, beverages, cosmetics, and wellness products.
The primary active components in green tea extract include tea polyphenols, catechins, epigallocatechin gallate (EGCG), and L-theanine. Tea polyphenols represent the major antioxidant fraction naturally found in green tea leaves and are commonly used as specification markers in green tea extract products. Catechins are a group of flavonoid compounds naturally present in green tea extract powder, including EGCG, epicatechin, epicatechin gallate, and epigallocatechin. Among these compounds, EGCG is considered one of the most important marker compounds in standardized green tea extract due to its relatively high concentration and analytical significance.
Green tea extract powder is commonly manufactured through water extraction, filtration, concentration, purification, and spray drying processes. Controlled production techniques help preserve the stability and consistency of tea polyphenols and catechins while minimizing excessive oxidation during processing. Compared with black tea or fermented tea materials, green tea extract retains a significantly higher catechin content because the tea leaves undergo minimal enzymatic oxidation after harvesting. This processing characteristic contributes to the distinctive composition profile of green tea extract and supports its use in premium botanical formulations.
Different grades of green tea extract are available depending on the target formulation requirements. High-polyphenol green tea extract is commonly used in functional beverages, capsules, tablets, and powdered drink blends. High-EGCG green tea extract is frequently selected for concentrated nutraceutical formulations where standardized catechin levels are required. L-theanine green tea extract grades are often incorporated into wellness-oriented beverage systems, nutritional powders, and specialty formulations due to the naturally occurring amino acid content found in tea leaves.
Green tea extract typically appears as a
yellow to light brown fine powder with good dispersibility under standard
formulation conditions. Solubility and dispersion performance may vary
depending on catechin concentration, EGCG purity, particle size, carrier
composition, and manufacturing process. In beverage applications, green tea
extract powder can be incorporated into instant tea powders, energy beverages,
powdered drink mixes, and ready-to-mix formulations. In dietary supplement
manufacturing, green tea extract is widely used in capsules, tablets, sachets,
gummies, and functional nutrition systems. In cosmetic and personal care
formulations, green tea extract may be added to creams, serums, masks,
cleansers, and skincare products due to its plant-derived antioxidant
composition.
Because tea polyphenols and catechins are sensitive to environmental factors, proper storage conditions are important for maintaining product stability. Green tea extract powder may absorb moisture under humid conditions and should therefore be stored in sealed containers away from excessive heat, light, oxygen, and humidity. Standard packaging for green tea extract commonly includes aluminum foil bags, fiber drums, or customized bulk packaging suitable for international transportation and long-term storage.
The quality of green tea extract is typically evaluated through analytical methods such as HPLC and UV testing. HPLC analysis is widely used for the quantification of EGCG, catechins, and L-theanine, while UV methods are often applied for total tea polyphenol determination. Standardized green tea extract products may also comply with ISO quality systems, and KOSHER or HALAL certification can be available depending on production requirements.
Today, green tea extract remains one of the most important botanical ingredients in the global plant extract market. With its naturally occurring tea polyphenols, catechins, EGCG, and L-theanine, green tea extract powder continues to be widely used across nutraceutical, beverage, food, cosmetic, and functional ingredient industries, supporting the growing international demand for high-quality tea-derived botanical extracts.
Main specifications of green tea
extracts:
|
Product name |
Specification |
|||
|
GTP-99% |
EGCG 98% |
caffeine <0.1% |
||
|
GTP-99% |
EGCG 95% |
caffeine <0.1% |
||
|
GTP-99% |
EGCG 90% |
caffeine <0.1% |
||
|
GTP-99% |
Polyphenol 99% Catechin 90% |
EGCG 80% |
caffeine <0.1% |
|
|
GTP-99% |
Polyphenol 99% Catechin 90% |
EGCG 70% |
caffeine <0.5% |
|
|
GTP-99% |
Polyphenol 99% |
Catechin 85% |
EGCG 65% |
caffeine <1.0% |
|
GTP-99% |
Polyphenol 99% |
Catechin 80% |
EGCG 60% |
caffeine <0.5% |
|
GTP-98% |
Polyphenol 98% |
Catechin 80% |
EGCG 50% |
caffeine <0.5% |
|
GTP-98% |
Polyphenol 98% |
Catechin 75% |
EGCG 40% |
caffeine <0.5% |
|
GTP-95% |
Polyphenol 95% Catechin³80% |
EGCG 50% |
caffeine <3% |
|
|
GTP-90% |
Polyphenol 90% Catechin³75% |
EGCG 45% |
caffeine <12% |
|
|
GTP-80% |
Polyphenol 80% Catechin 60% |
EGCG 30% |
caffeine <8~12% |
|
|
GTP-70% |
Polyphenol 70% Catechin 50% |
EGCG 20% |
caffeine <12% |
|
|
GTP-60% |
Polyphenol 60% Catechin 45% |
------ |
caffeine <10% |
|
|
GTP-50% |
Polyphenol 50% Catechin 30% |
------ |
caffeine <10% |
|
|
GTP-40% |
Polyphenol 40% Catechin 25% |
------ |
caffeine <10% |
|
|
GTP-30% |
Polyphenol 30% Catechin 20% |
------ |
caffeine <10% |
|
Function:
1. Green tea extract serves as a concentrated source of tea polyphenols and catechins, making it suitable for formulations that require plant-derived functional ingredients with consistent composition.
2. The presence of catechins and EGCG contributes to the oxidative stability of formulated products and supports their use in systems where ingredient stability and quality preservation are important.
3. Specifications containing L-theanine allow green tea extract to be positioned for diverse formulation objectives while maintaining a botanical origin and standardized composition.
4. Through controlled extraction and standardization, green tea extract offers predictable behavior and compatibility across different formulation environments.
Application:
1. In food and beverage applications, green tea extract is used in functional powders, premixes, beverages, and solid formats where tea-derived ingredients are required.
2. In cosmetic and personal care formulations, green tea extract is incorporated into products such as creams, lotions, serums, and masks due to its compatibility with common formulation systems.
3. In nutraceutical and dietary supplement products, green tea extract is used in capsules, tablets, and granulated forms, with specifications selected according to formulation needs.
4. In ingredient and industrial applications, green tea extract functions as a standardized botanical raw material suitable for large-scale manufacturing and international supply.
Green Tea Extract — FAQ Section
11. What are the typical specification ranges available for green tea extract?
Green tea extract is available in multiple specification ranges depending on formulation needs. Common grades include tea polyphenols 30%–98%, catechins 20%–80%, and EGCG 10%–98%. Different green tea extract specifications are selected based on beverage stability, capsule formulation, cosmetic compatibility, or nutraceutical product requirements.
12. Why is EGCG content important in green tea extract quality evaluation?
EGCG content is one of the most recognized indicators used in green tea extract quality control because EGCG represents a major catechin fraction naturally found in Camellia sinensis leaves. Higher EGCG green tea extract grades are often associated with more concentrated catechin profiles and stricter processing standards.
13. What is the difference between tea
polyphenols and catechins in green tea extract?
Tea polyphenols are a broader group of phenolic compounds present in green tea extract, while catechins are a specific subgroup within tea polyphenols. EGCG, ECG, EGC, and EC are among the primary catechins measured in standardized green tea extract products.
14. Does green tea extract have a characteristic color and odor?
Yes. Green tea extract powder typically ranges from light yellow-brown to dark brown-green depending on catechin concentration and purification level. The ingredient naturally carries a mild tea-like aroma and slightly astringent profile characteristic of concentrated green tea extract.
15. What extraction methods are commonly used for green tea extract production?
Green tea extract is commonly produced through water extraction, ethanol-water extraction, membrane concentration, filtration, and spray drying processes. The selected extraction method influences catechin retention, caffeine level, purity, and overall green tea extract stability.
16. Can green tea extract be used in beverage formulations?
Yes. Green tea extract is widely incorporated into powdered beverages, instant drinks, functional teas, ready-to-drink formulations, and nutritional beverage systems because of its dispersibility and standardized catechin composition.
17. Why does green tea extract sometimes appear darker over time?
Color variation in green tea extract may occur due to oxidation of catechins and polyphenols during exposure to air, light, humidity, or elevated temperatures. Proper packaging and low-moisture storage conditions help preserve the original appearance of green tea extract powder.
18. Is green tea extract compatible with capsule and tablet production?
Green tea extract is commonly used in capsule and tablet manufacturing because the powder can be standardized for particle size, bulk density, and moisture control, supporting stable blending and compression performance during supplement production.
19. Can green tea extract be combined with other botanical ingredients?
Yes. Green tea extract is frequently formulated together with botanical extracts, vitamins, amino acids, collagen ingredients, and antioxidant compounds in nutraceutical and functional food applications.
20. What packaging formats are commonly used for bulk green tea extract?
Bulk green tea extract is typically supplied in aluminum foil bags combined with fiber drums to help reduce exposure to moisture, oxygen, and light during transportation and long-term storage.
21. What is the shelf life of green tea extract powder?
The shelf life of green tea extract generally depends on storage conditions, packaging integrity, and specification grade. Under cool, dry, and sealed conditions, green tea extract commonly maintains stability for around two years.
22. Why is moisture control important for green tea extract storage?
Green tea extract powder may absorb environmental moisture, which can affect flowability, dispersibility, appearance, and catechin stability. Moisture protection is therefore essential for maintaining green tea extract quality during storage and transportation.
23. Can green tea extract be used in cosmetic formulations?
Yes. Green tea extract is widely used in cosmetic and personal care formulations including creams, serums, facial masks, cleansers, and lotions because of its botanical origin and polyphenol composition.
24. What particle sizes are available
for green tea extract powder?
Green tea extract can be processed into different mesh sizes and particle distributions depending on application requirements. Fine powder grades are commonly selected for beverage, capsule, and cosmetic manufacturing systems.
25. Is green tea extract sensitive to high processing temperatures?
Yes. Excessive heat exposure during formulation or storage may affect catechin stability and overall green tea extract quality. Controlled processing conditions are often recommended for maintaining standardized active compound levels.
26. Why do some green tea extract products specify decaffeinated grades?
Certain applications require reduced caffeine content for formulation purposes or market positioning. Decaffeinated green tea extract allows manufacturers to maintain catechin and polyphenol concentrations while lowering caffeine levels.
27. How is green tea extract commonly identified in ingredient documentation?
Green tea extract is usually identified by its botanical source, Camellia sinensis, along with specification details such as polyphenol percentage, catechin content, EGCG level, testing method, appearance, and extraction ratio when applicable.
28. Can green tea extract be used in instant powder blends?
Yes. Green tea extract is commonly incorporated into instant powder formulations because of its relatively good dispersibility and compatibility with nutritional beverage systems, powdered supplements, and functional drink mixes.
29. What testing methods are commonly applied to green tea extract?
Green tea extract is commonly tested using HPLC, UV, moisture analysis, microbiological testing, heavy metal screening, and particle size analysis to ensure specification consistency and quality compliance.
30. Why is antioxidant stability important in green tea extract processing?
Catechins and tea polyphenols in green tea extract are naturally sensitive to oxidation during manufacturing and storage. Controlled processing helps maintain ingredient consistency, appearance, and specification reliability.
31. Can green tea extract be supplied in customized formulation grades?
Yes. Manufacturers can provide customized green tea extract grades with adjusted EGCG concentration, caffeine level, solubility characteristics, mesh size, or carrier systems depending on application requirements.
32. Is green tea extract suitable for international ingredient manufacturing markets?
Green tea extract is widely traded in global ingredient industries and is commonly used by manufacturers in nutraceutical, beverage, cosmetic, and food sectors because of its standardized composition and broad formulation compatibility.
33. What storage conditions are recommended for green tea extract powder?
Green tea extract should generally be stored in tightly sealed containers under cool, dry, and light-protected conditions to help maintain catechin stability, powder flowability, and overall product quality.
34. Why is standardized green tea extract preferred in industrial formulations?
Standardized green tea extract provides more consistent polyphenol, catechin, and EGCG levels compared with non-standardized tea materials, helping manufacturers achieve better formulation consistency, quality control, and batch reproducibility.
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