In vitro bioactive compounds releasing property were evaluated using the encapsulated produced under the
optimal condition of Yanang extract encapsulation with calcium-alginate hydrogel. To mimic the digestive tract in
human body, 0.05 M HCl (pH 1.2) with 0.2% NaCl was used as a stimulated gastric fluid and 0.05 M phosphate
buffer (pH7.4) as a stimulated intestinal fluid, but this simulation system did not contained digestive enzymes [7].