A B S The changes of lifestyle and eating habits of consumers have induced a growth in the demand for functional food The aim of this work was to study the incorporation of acid into a slices by using (oH) and folic vacuum impregnation (VI) at 30, 40 and 50 "Cand air drying at 50, 60 c to obtain an apple snack that is and 70 rich in folic acid. The kinetic impregnation of folic acid, texture and color were evaluated. The impregnated samples (VI) at 40 and vacuum impregnated samples with heating presented a high content of folic acid, whereas the samples air dried at 60 "c presented an important retention of folic acid. The lowest loss of firmness and color was obtained with the VI/oH treatment 50 Therefore the VIMoH treatment at 50 c by drying at 60 "c determined to be the best process for creating dehydrated apple slices was that are rich in folic acid. apples by The aim of this research was to study the incorporation offolic acid into dehydrated sliced uating the using vacuum impregnation/ohmic heating (VINOH) treatments and air technologies and eval- mechanical and optical properties of the resulting product. Two technologies vacuum impregnation (VI) and ohmic heating (oH) were performed at 30. 40 or with an electric field intensity of 13 v/cm using conventional heating. The results showed that the samples impregnated of apple slices by VI and treatments reached the highest content offolic acid. However, the samples that were dried at 60 impreg- nation by the treatment c exhibited an increase in folic acid due to the electro effect, which induces retention of folic acid and an increase in the folic acid concentration by decreasing the water content. Under the investigated conditions, the vvoH treatment at 50 ac by air 60 mc may be considered the best processing method to obtain an apple snack that is rich in folic acid. o 2016 Elsevier Ltd. All rights reserved.