... ,ISO9001 2.100% purple sweet potato 3.high purity,competitive price high-end health care product anthocyanidin powderPurple potato introduction ... means of solvent. The extraction agents include ethanol, citric acid, etc. After filtration, concentration and other processes, the ... drinks, cheeses, seafood, fruit juice, jelly, cereal and other foods. Belonging to the natural non-toxic product and with no ...