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The stool guaiac test involves fasting from iron supplements, red meat (the blood it contains can turn the test positive), certain vegetables (which contain a chemical with peroxidase properties that can turn the test positive), and vitamin C and citrus fruits (which can turn the test falsely negative) for a period of time before the test.
Although pale stool is not normal, there are a number of reasons why this happens, says family practitioner Kavita Shanker-Patel, MD, practicing family medicine at Northwestern Medicine Central ...
A stool test is a medical diagnostic technique that involves the collection and analysis of fecal matter. Microbial analysis (culturing), microscopy and chemical ...
Find out what the shape, texture, and consistency of your poop says about your health, according to the Bristol Stool Chart—from hard and lumpy to soft. 7 Textures of Poop and What They Mean ...
When you eat food, it eventually turns that color by the time it exits the body in the form of stool, according to Baltimore colon and rectal surgeon Jeffery Nelson, MD, the surgical director at ...
The Bristol stool scale is a medical aid designed to classify the form of human feces into seven categories. Sometimes referred to in the UK as the Meyers Scale, it was developed by K.W. Heaton at the University of Bristol and was first published in the Scandinavian Journal of Gastroenterology in 1997. [4]
Phenolphthalein is used in toys, for example as a component of disappearing inks, or disappearing dye on the "Hollywood Hair" Barbie hair. In the ink, it is mixed with sodium hydroxide, which reacts with carbon dioxide in the air. This reaction leads to the pH falling below the color change threshold as hydrogen ions are released by the reaction:
The test is fast and can be performed in a doctor's office. A patient must not be receiving antibiotics. At least half a milliliter of feces is collected, and a strip of nitrazine paper is dipped in the sample and compared against a color scale. A pH of less than 5.5 indicates an acidic sample. [5]