Quillaia

Quillaia is the milled inner bark or small stems and branches of the soapbark (Quillaja saponaria, Molina). Other names include China bark extract, Murillo bark extract, Panama bark extract, Quillai extract, Quillaia extract, Quillay bark extract, and Soapbark extract. It contains a high concentration of saponins which is increased by processing; highly purified quillaia is used to enhance vaccines. Other compounds in the extract include tannins and other polyphenols, and calcium oxalate. It is listed as an ingredient in root beer and cream soda.