In 1990 they switched to vegetable oil with beef flavouring<ref name='MC'/><ref name='BT'/> after a sustained campaign against the beef tallow they were using.
The "thin style" french fries have been popularised worldwide in large part by the McDonald's and [[Burger King]].<ref>{{cite web|title=Popularization|date=21 April 2011 |url=https://www.today.com/food/how-time-fries-have-potatoes-outlived-their-potential-1C9005243|access-date=3 January 2018|publisher=today.com|archive-date=30 October 2020|archive-url=https://web.archive.org/web/20201030090642/https://www.today.com/food/how-time-fries-have-potatoes-outlived-their-potential-1C9005243|url-status=live}}</ref>
In 2008, McDonald's got rid of trans fats in both US and Canada markets.<ref name='MC'/>
