Extraction of selected prohealth substances from Curcuma longa and Zingiber officinale in artificial digestive juices

BACKGROUND The study determined the content of selected bioelements, toxic metals and phenolic acids occurring in Curcuma longa L . and Zingiber officinale Rosc. Natural raw materials in the form of powder, slices, dried and fresh rootstock, tablets and capsules were analyzed. To determine the actual bioavailability of the metals and phenolic acids present in the raw materials, they were extracted into artificial digestive juices (artificial...