Fast-food giant McDonald's has confirmed in a statement that it has stopped using ammonium hydroxide in its hamburger meat.

MSNBC.com reports that McDonald's denies the decision was influenced by a campaign by celebrity chef and nutrition-promoter Jamie Oliver to get ammonium-hydroxide-treated meats like chicken and beef out of the U.S. food supply. In a segment aired in April of last year on his TV show "Jamie Oliver's Food Revolution," Oliver discussed the dangers of using "pink slime" or ammonia-treated scrap meat in fast-food products.

Months after the pressure was publicly placed on fast-food chains to stop using ammonium hydroxide, McDonald's agreed to stop. A statement on McDonald's website reads, "At the beginning of 2011, we made a decision to discontinue the use of ammonia-treated beef in our hamburgers. This product has been out of our supply chain since August of last year. This decision was a result of our efforts to align our global standards for how we source beef around the world."