Typically, you will need to fast for up to 12 hours before your test, so if you have a lot of medications, talk with your doctor about what should be taken the night before, and follow their instructions carefully.
There are a number of common types of blood tests that you can have at your doctor's office or a lab, such as a complete blood count (CBC), or a basic metabolic panel. This is a collection of different tests that measure how your body functions, including glucose, calcium, sodium, potassium, chloride, creatinine, and blood urea nitrogen (BUN). Other common types of blood tests include coagulation factors, which are the proteins and chemicals in your body that can help you clot blood, and various autoimmune and immune-system tests.

These declinations can correspond to such things as food preference, age, race, sex, menstrual cycle, physical exercises, handling of the specimen and samples collection problems, over-the-counter medications (cold drugs, aspirin, vitamins, etc.), smoking, prescribed medications, alcohol intake and a number of non-disease-related reasons. You should talk about any abnormal and unusual lab results with your health provider. It is important to understand that laboratory results may be outside of the normal interval range for variety of factors. It is unlikely to cure or diagnose any disorder or health condition with a single blood test only. But, it can be helpful for you to understand more about your health and identify potential problems in early stages when updating your personal habits and treatment can work effectively.Medical lab tests are tools useful in estimating the health condition of an individual.