//Click here. A blood test can determine the presence and/or amount of things that can be found in the blood.

Are you wondering about something specific? If you want a list of all available tests, my advice is to check with your doctor or local laboratory. I'm sure they'll be happy to explain them.

If someone orders a blood test for you, they should tell you what they're ordering. While it's possible to test a blood sample for loads of things, a lab will only do the specific tests ordered by the doctor. In other words, if a doctor orders a blood test for cholesterol levels, you won't accidentally find out you have low irony levels.