National chain restaurants typically reveal only that fries may contain one or more of the following oils: corn, canola, soybean, cottonseed, sunflower and palm.
Corn oil is probably the least healthy of the oils mentioned, with more harmful saturated fats than canola or sunflower and fewer heart-healthy compounds than soybean.
Safflower or Sunflower Oil:Omega-3s get a lot more talk, but omega-6 fatty acids - like the linoleic acid in these two oils - are also important for healthy skin.