Bamboo Leaf Extract: Appearance:Brown Powder Flavone: 5- 30% (HPLC) Internal ester: 4-12%(HPLC) silica; 70% ... related research work,effective ingredients of bamboo leaf extract include flavone,phenolic acid,lactone,polyose,amino acid,microelements,etc,with enhanced ... moisture and strong light/heat. Pure Natual Bamboo Leaf Extract /flavone, internal ester, silica