Come across this yesterday and was having a discussion about this with
a friend, thought I'd re-post it here FYI...

According to Macdonalds, here is the contents of their French Fries:

"what's in it | McDonald's
potatoes
We like our fries and hash browns fluffy on the inside, crunchy on the
outside. That’s why we use potato varieties like Russet Burbank,
Shepody and Russet Ranger"
http://mcdonalds.com.au/our-food/whats-in-it

Here's what's *actually* in their French Fries:

Potatoes, canola oil, hydrogenated soybean oil, safflower oil, natural
flavour (vegetable source), dextrose, sodium acid pyrophosphate
(maintain colour), citric acid (preservative), dimethylpolysiloxane
(antifoaming agent) and cooked in vegetable oil (Canola oil, corn oil,
soybean oil, hydrogenated soybean oil with THBQ, citric acid and
dimethylpolysiloxane) and salt (silicoaluminate, dextrose, potassium
iodide)
http://www.undergroundhealth.com/mcd...ncluding-gmos/

All GMO, where possible, of course.
And here I was just using oil and potatoes!