Overview
Green tea extract is derived from the leaves of Camellia sinensis. It is valued for its high concentration of bioactive compounds, particularly catechins like epigallocatechin gallate (EGCG). These compounds are responsible for its antioxidant, anti-inflammatory, and potential health benefits. The extract is commonly standardized to a specific polyphenol or catechin content, making it a popular ingredient in dietary supplements, functional foods, and cosmetics. Industrial production involves water or ethanol extraction, followed by purification and concentration. The quality of the extract depends on factors such as the tea variety, growing conditions, and extraction methods. B2B buyers often prioritize suppliers who provide transparent sourcing and rigorous quality control.
Physical and Chemical Properties
Green tea extract is typically a fine powder with a light brown to dark green color, depending on the concentration of polyphenols and chlorophyll. It is hygroscopic, meaning it absorbs moisture from the air, which can affect its stability. The extract is soluble in water and ethanol, making it versatile for various formulations. Key chemical components include catechins (EGCG, EGC, ECG), caffeine, theanine, and flavonoids. EGCG is the most studied catechin, accounting for up to 50% of the total catechin content. The extract's antioxidant activity is measured by ORAC (Oxygen Radical Absorbance Capacity) values, which are significantly higher than many other plant extracts.
Main Applications
Green tea extract is widely used in the dietary supplement industry for its potential health benefits, including weight management, cardiovascular support, and cognitive enhancement. It is also incorporated into functional foods and beverages, such as energy drinks and fortified snacks, to provide antioxidant properties. In cosmetics, the extract is valued for its anti-aging and skin-protective effects. It helps neutralize free radicals, reduce inflammation, and improve skin elasticity. Additionally, it is used in oral care products for its antimicrobial properties, which can help reduce plaque and bad breath.
Safety and Storage
Green tea extract is generally considered safe for consumption and topical use, but excessive intake may lead to caffeine-related side effects like insomnia or digestive discomfort. The recommended daily dose varies by application but typically ranges from 100-500 mg of standardized extract. Proper storage is essential to maintain potency. The extract should be kept in a cool, dry place, away from direct sunlight and moisture. Packaging often includes desiccants or nitrogen flushing to prevent oxidation. Suppliers should provide stability data to ensure the product meets shelf-life expectations.
B2B Procurement Guide
When sourcing green tea extract, B2B buyers should prioritize suppliers with certifications such as ISO, GMP, or organic standards. Key specifications to verify include catechin content (e.g., ≥50% polyphenols, ≥30% EGCG), heavy metal limits, and pesticide residues. Pricing varies based on purity, standardization, and order volume. Bulk purchases (e.g., 100 kg or more) often qualify for discounts. Buyers should request samples and COAs before committing to large orders. Additionally, consider suppliers who offer custom formulations or private labeling services for branded products.
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