Aryana,
There are in fact several foods with artificial coloring that can indeed make your stools look reddish or maroon, including RED GELATIN (there's your Jell-O!!), cherry popsicles, red/cherry Kool-Aid drinks, tomato juice or soup and as titchou mentioned, beets, which are not artificially colored.
Stay away from Jell-o for now and see if your stools return to normal. If not then check in with your doctor. But my guess is that it probably was the Jello-O.
zuzu
There are in fact several foods with artificial coloring that can indeed make your stools look reddish or maroon, including RED GELATIN (there's your Jell-O!!), cherry popsicles, red/cherry Kool-Aid drinks, tomato juice or soup and as titchou mentioned, beets, which are not artificially colored.
Stay away from Jell-o for now and see if your stools return to normal. If not then check in with your doctor. But my guess is that it probably was the Jello-O.
zuzu