Resistant starch (RS) and oil uptake were determined in potatoes (fren
ch fries and crisps) fried in olive oil. The RS content of crisps was
very low (1% dry matter, DM), while an appreciable amount of RS was fo
und in french fries (5% DM). A high correlation between RS content and
cross-section (CS) of french fries was found: RS = 2.64 + 0.54CS, r =
0.999. When samples (potato starch standards and freeze-dried crisps)
were dehydrated before frying, the thermal process caused a high incr
ease of RS (18-32% DM). Moisture and thickness seem to be important fa
ctors affecting oil uptake and RS values in fried potatoes. (C) 1997 E
lsevier Science Ltd.