McDonald's announced today that they've introduced fresh beef to about 3,500 of their restaurants and plans to reach 13,000 U.S. locations by early May, CNBC reports.

Why it matters: McDonald's has been trying to keep it's prices low, while also improving the quality of their food — adding fruit options and removing soda from its "Happy Meals." But this move has taken four years and has McDonald's suppliers spending around $60 million to update their supply chains for the fresh beef Quarter Pounders.