A functional mathematical index for predicting effects of food processing on eight sweet potato (Ipomoea batatas) cultivars

► Nutrient retition was studied in Ipomoea batatas cultivars. ► The use of FMI index in cooking processes on six phenols in eight potato cultivars. ► The index allows the evaluation of nutritional, safety, and processing aspects. ► The results suggest us that the FMI is able to predict the processing effects.