the impairment of artery function that can occur within hours of eating red-light fare like fast food and cheesecake. The same detrimental effect happens after the consumption of olive oil8 and other oils9 (but not after eating green-light sources of fat like nuts).10 Even extra-virgin olive oil may impair your arteries’ ability to relax and dilate normally.11 So, like any yellow-light food, its use should be curtailed.
