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home > FAQ > Plant Extract > Green Tea Extract: Complete Guide to EGCG and L-Theanine Benefits

Green Tea Extract: Complete Guide to EGCG and L-Theanine Benefits

2026-04-15
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Green Tea Extract
We are a professional plant extract manufacturer in China, focusing on the R&D and production of Curcuma Longa Extract extrac
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Green Tea Extract

What is Green Tea Extract?

Green Tea Extract is derived from the leaves of Camellia sinensis, rich in powerful polyphenols called catechins, particularly epigallocatechin gallate (EGCG). It also contains L-theanine, an amino acid that promotes relaxation and mental clarity without drowsiness.

Key Benefits

  • Antioxidant Support: EGCG provides powerful free radical protection and cellular health support
  • Metabolic Health: Supports healthy metabolism and weight management
  • Cognitive Function: L-theanine promotes calm focus and mental clarity
  • Cardiovascular Health: Supports healthy cholesterol levels and heart function
  • Energy Support: Natural caffeine provides sustained energy without jitters

Available Specifications

  • Green Tea Extract 98% L-Theanine (98:1 extract, less than 0.1% EGCG)
  • Green Tea Extract 55% EGCG (25:1 extract, less than 1% caffeine)
  • Green Tea Extract 45% Polyphenols (5:1 extract)

Applications

  • Weight management supplements
  • Cognitive health and focus products
  • Antioxidant formulations
  • Energy and sports nutrition
  • Cardiovascular health supplements

Quality Standards at Greensky

Our green tea extracts are produced using ethanol and water extraction methods. High-purity L-theanine extract offers excellent water solubility. All products are tested for catechins, caffeine, L-theanine, heavy metals, pesticides, and microbial contamination.

Extraction Method: Ethanol and Water extraction

Certifications: ISO22000, BRCGS, SGS-GMP


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