Feeling sub optimal the day after eating a large packet of McDonald's french fries, I decided to check out their ingredients. Did you know McDonald's use a hydroquinone derivative in the oil used to cook their fries ? It's used as an antioxidant to reduce rancidity, and known as TBHQ. http://en.wikipedia.org/wiki/Tert-Butylhydroquinone The temporary dip in my well being might have been coincidental, but even the idea of eating so many unusual ingredients makes me want to stay far away from them! http://nutrition.mcdonalds.com/nutritionexchange/ingredientslist.pdf Peter.