the contents of water soluble carbohydrates in GTPs increased with the decrease in particle size during superfine grinding, which benefits the improvement in GTP taste. Additionally, it also suggested that the moderate decrease in polyphenol benefit to reduce bitterness (Table 4). Therefore, GTP could be accepted by most people. Table 4 showed no significant difference in the contents of total free amino acids and theanine in each GTP. It implies that the briskness quality
of green tea could be preserved well during superfine grinding