If you are interested in the quality of McDonald's food (everyone SHOULD be interested in the quality of the food they eat), then do spend 5 minutes at www.mcdonalds.com/qualityfood.
This website offers up all sorts of info about various products. For example, The McChronicles drilled down into the chicken sandwich and was presented with a Q&A session that informed us, "First, we fry the breaded all white meat chicken strips in our Canola oil blend. While the chicken is cooking, the flour tortilla is being heated. " There are TEN pages of this stuff, just for chicken!
There was much more, and even deeper drilling available for full nutritional information.
Check it out. This stuff is important to know.
The McChronicles: a blog about, not affiliated with, McDonald's.
Image: screen grab from www.mcdonalds.com.qualityfood.