McDonald's stores across America will serve most of their burgers free from artificial preservatives, the company has announced.
The fast-food giant has reformulated seven of its most popular recipes, making changes to the American Cheese, Big Mac Sauce and buns.
Classics including the hamburger, cheeseburger, Big Mac and the Quarter Pounder with Cheese are now preservative free following an improvement to their ingredients, USA Today reports.
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Pickles still contain an artificial preservative, however McDonald's USA president Chris Kempczinski urges customers to skip it if they prefer.
The changes are part of a demand to meet customers' elevated expectations.
To date, McDonald's has switched to 100 percent fresh beef in Quarter Pounders and has committed to cage-free eggs by 2025.
The world's largest burger chain removed and artificial preservatives from Chicken McNuggets after ditching high-fructose corn syrup from its buns in 2016.
Prices are not expected to rise, with Mr Kempczinski explaining costs to make the switch were "minimal".
"We know quality choices are important to our customers, and this latest positive change to our classic burgers demonstrates our committed journey to leading with the customer and building a better McDonald's," Mr Kempczinski said.
"All you have to do is look around at... packaged foods and other restaurant concepts. Customers certainly are becoming more demanding about knowing what's in their foods."