where A0 is the reference value of absorbance, measured in a reaction mixture without sample, and Asample is the absorbance of each reaction mixture containing different volumes of ethanolic extract. Then, the sample mass required to cause 50% DPPH• inhibition (EC50) was determined and antioxidant capacity was expressed as the reciprocal of EC50, i.e., AC = 1/EC50 (1/g dry matter). AC retention was calculated for every formulation and drying temperature studied, as the ratio of ACf to AC0.