Welcome to Steve Spangler Science. Skip directly to: main content, navigation, search box.

Color Changing Milk of Magnesia

How antacids work in your stomach


With Thanksgiving just around the corner it's time to start thinking about all that good food... and all that heartburn. But, have you ever wondered how those antacids really work inside your stomach? This demonstration will show you exactly how Milk of Magnesia neutralizes the acids in your stomach and saves the day after Thanksgiving dinner.