Why is my stool green?

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I am a 62 yr.old female I have constipation and I am on lynsinpril for high blood pressure

2 Answers

These messages are for mutual support and information sharing only. Always consult your doctor before trying anything you read here.

Green stool is usually the result of a high quantity of leafy, green vegetables in someone’s diet. Specifically, it is the chlorophyll in the plant that produces the green color.

Diet-based reasons for green poop are by far the most common, but there are others; people who do not eat a lot of greens or food coloring should be wary, as green poop can have a more serious cause.

Bile pigment – stool may be green due to bile pigment in the stool. If food moves too quickly through the intestine, bile pigment can’t break down sufficiently. One potential cause of this is diarrhea.

Parasites and bacteria – certain pathogens can cause poop to turn green, including the Salmonella bacterium, Giardia (a water-based parasite), and norovirus. These unwelcome guests can cause the guts to work faster than normal, impacting stool color.

Other than the green stool, you have no other discomforts?  If so, it is mostly caused by something you ate.

The most common reason for green stool is a dietary habit or change. Food that can cause green stools include:

kale

spinach

broccoli

blueberries

Dark green vegetables and green powder supplements contain a lot of chlorophyll, the chemical that allows plants to make energy from the sun. This can turn your Cleveland Brown into a Green Bay Packer. That doesn’t mean there’s something wrong. Keep eating those greens!

Some foods contain food coloring that doesn’t get processed properly. This can also leave a colorful residue in your stool. So if you wake up after a St. Patrick’s Day spent imbibing green beer and notice something off when you go to the bathroom, you probably just need some water.

The food coloring you consume doesn’t necessarily have to be green in order to make your poop green. Purple, blue, and black dyes may also lead to green poop. For example, in 2015, fast food chain Burger King went viral with posts from individuals who had purchased their “Halloween Whopper,” which had a black bun. Many people who partook in the Halloween Whopper reported that it turned their poop green after eating it.
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