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Tests
A urobilinogen in urine test measures the amount of urobilinogen in your urine (pee). Urobilinogen comes from bilirubin. Your body makes bilirubin during the normal process of breaking down old red blood cells. Your liver uses the bilirubin to make bile, a fluid that helps you digest food in your intestines. Some bile flows through your bile ducts (small tubes) from your liver directly into your intestines. The rest is stored in your gallbladder for when you need it.
Tests
A vitamin B test measures the amount of one or more B vitamins in your blood or urine (pee). B vitamins are nutrients that your body needs to work well and stay healthy. There are eight different types. All together, they are called the “B vitamin complex.”
Article
Research record from J Pharm Biomed Anal, 2026-08-06. PMID 42570397.
Tests
Xylose, also known as D-xylose, is a type of sugar ( carbohydrate ) that is normally easily absorbed by your intestines. A xylose test checks the level of xylose in both your blood and urine to see how well you absorb carbohydrates.
Tests
A Zika virus test looks for signs of the Zika infection in your blood or urine. Zika is a type of flavivirus, as is dengue fever and West Nile . Like those viral infections , Zika is usually spread by mosquitoes , especially in areas with tropical climates, such as parts of Central and South America, Africa, Mexico, and islands in the Caribbean and Pacific. Because Zika can enter bodily fluids such as blood, urine (pee), and semen, it can also spread through sex with an infected person or from a pregnant woman to her fetus.
