Your potassium levels can indicate underlying health conditions like high blood pressure or kidney disease. A doctor may perform a potassium blood test as part of a routine physical. A potassium test ...

The fluorescent treponemal antibody absorption (FTA-ABS) test is a blood test that checks for the presence of antibodies to Treponema pallidum bacteria. These bacteria cause syphilis. Syphilis is a ...

Blood glucose levels vary, depending on a person’s health status and whether they have eaten. People without diabetes typically have between 72–140 milligrams of glucose per 1 deciliter of blood.

Not everyone needs to fast before a blood test. Only certain types of blood test require this. Each test has different guidelines on how long a person should fast beforehand. Fasting before a blood ...