They use vegetable oil in the US. The reason why McDonald fries are not vegan is due to the flavoring, not the oil.
From https://www.mcdonalds.com/us/en-us/product/small-french-frie...
> French Fries
> Ingredients: Potatoes, Vegetable Oil (canola Oil, Corn Oil, Soybean Oil, Hydrogenated Soybean Oil, Natural Beef Flavor [wheat And Milk Derivatives]), Dextrose, Sodium Acid Pyrophosphate (maintain Color), Salt. natural Beef Flavor Contains Hydrolyzed Wheat And Hydrolyzed Milk As Starting Ingredients. >Contains: Wheat, Milk.
They use vegetable oil in the US. The reason why McDonald fries are not vegan is due to the flavoring, not the oil.
From https://www.mcdonalds.com/us/en-us/product/small-french-frie...
> French Fries
> Ingredients: Potatoes, Vegetable Oil (canola Oil, Corn Oil, Soybean Oil, Hydrogenated Soybean Oil, Natural Beef Flavor [wheat And Milk Derivatives]), Dextrose, Sodium Acid Pyrophosphate (maintain Color), Salt. natural Beef Flavor Contains Hydrolyzed Wheat And Hydrolyzed Milk As Starting Ingredients. >Contains: Wheat, Milk.