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maroon and red colored stool can be due to foods that you eat which are red colored like beets or tomatos or red peppers
or it could in rare cases be due to blood in your stools
only a stool occult blood test can tell if there is blood in your stools
how old are you?
are you male or female?
did you eat any beets? or beet smoothies ?
do you have a doctor you can see who can test your stools for blood?
GERDS would not cause purple urine
GERDs can cause inflammation of your stomach and acid reflux.
severe GERDs can cause stomach ulcers and bleeding from the stomach
bleeding from the stomach would turn your stool tar black.
did you eat any beets or beet smoothies?
beets can turn your stools red and maroon and turn your urine purple or red.