The fast food chain McDonald's is being urged to ban products, such as milk and meat, which come from animals which have been treated with antibiotics.
Scientists have urged McDonald's to ban these products because they believe 23,000 Americans have been killed by such products.
A new online campaign is putting pressure on McDonald's to ban animal products which use antibiotics, like cheese and meat.
Scientists believe that using antibiotics in farm animals can cause superbugs. They also believe that it can kill people, therefore, pose a risk to human health.
McDonald's has already made some development in this area. Last year they stated that they would stop using poultry which had been treated with antibiotics.
They said in 2015 that poultry with antibiotics would be removed from their menu within two years.
Now McDonald's has been urged to stop the use of other animals which have antibiotics give to them.
They have issued a statement saying:
"We continue to regularly review this issue,"
One such charity focusing on stopping antibiotics being overused, and used unnecessarily, is the charity Compassion in world farming.
We now have to wait and see if McDonald's, and other restaurant chains, such as KFC, will stop using these products.