By Kay Quinn
St. Louis (KSDK) - A pink goo has been used as a ground beef additive in McDonald's beef patties for years.
The goo is beef trimmings treated with ammonium hydroxide, and on Tuesday McDonald's announced it will no longer use it in its products.
Sarah Prochaska, a registered dietitian at Barnes-Jewish Hospital joined NewsChannel 5 First @ 4 via Google Plus to talk about this stuff.
Click the video player above to watch her interview.