Breakfastarians rejoiced when McDonald's announced that it will start serving breakfast all day. After all, they had been asking for it for a long time (note the date on this tweet).
But experts who are concerned about the price of eggs were not so happy.
As Bloomberg News reports, McDonald's could soon start selling so many Egg McMuffins that it may actually raise the price of eggs, hurting restaurants and consumers.
Related story: McDonald's U.S. to add all-day breakfast on Oct. 6
"It's going to make it harder for everyone. It's going to lift prices across a lot of those products that use eggs," Darren Tristano, executive vice president at the research firm Technomic, said to Bloomberg.
An outbreak of avian flu earlier in the year killed more than 48 million birds and caused egg prices to soar to record levels.
McDonald's purchasing power is huge: It has more than 14,300 U.S. restaurants, according to the Wall Street Journal. As a result, its decision to serve certain breakfast items all day may significantly reduce supply and increase egg prices.
Still, for the true Breakfast Believers, it may all be worth it.