“…Epigallocatechin gallate (EGCG) is a kind of polyphenol from tea. Recent studies have shown that EGCG has many excellent properties such as antitumor, antiradiation, and anti-oxidation capability [ 1 , 2 , 3 , 4 , 5 , 6 ]. However, EGCG is sensitive to neutral and alkaline solutions and becomes unstable as the oxygen concentration, temperature, and pH increases, resulting in impossible direct usage in these environments [ 7 , 8 , 9 , 10 ].…”