This oil
resists to oxidation and conserves the higher amount of unsaturated fatty acids even after 30 h of heating.
The evolution of saturated fatty acid composition is estimated at 5.5% and 25% in the oil with and without
extract, respectively, at the end of the heating treatment. Sensorial analysis carried out showed that the
fried potato prepared in oil with rosemary extract had the best crispiness and taste until the fifteenth
frying. The oil with rosemary extract showed an enhanced stability and therefore a best quality compared
to the oil without rosemary extract.