When a sick person visits the doctor, the first thing doctor recommend is blood tests. Why they recommend blood tests to every patient? What is the fact behind it? Well, blood tests actually require a small amount of blood but provide a large amount of information which includes the significant changes to optimize performances. These are basically the instant prediction of small imbalances or potentially larger problems. Moreover, blood tests information help people to make changes in order to improve cognition and metabolism, build muscles, reduce inflammation, and optimize mood. There are two sorts of blood tests including fasting and non-fasting blood tests. In the latter one, there is no restriction on drinking or eating before having blood test while the former one instruct fasting for blood work, as the blood fat or glucose level elevates for several hours after eating or drinking which would affect the blood reports. There are several other facts which will be discussed in the following points:
- Fasting for Lipid Profile
Lipid profile is a sort of blood test which is conducted to monitor the cholesterol and other blood fats level. Typical fasting time for this test is 9 to 12 hours. If a person eats anything before going for a test, then these nutrients would absorb into the blood stream and could affect the accuracy of blood reports.
- Fasting for renal functional panel
This is a blood test which is used to assess the health of kidneys, whether they are working fine or not. Typical fasting time for this test is 8 to 12 hours. This test is actually used for people who are already receiving the treatment for a kidney problem.
- Gamma-glutamyl transferase (GGT)
This test indicates the level of gamma-glutamyl transferase (GGT) enzyme in the body. High quantity of this enzyme may lead to liver disease, alcohol abuse or bile duct problems. The doctor will ask for fasting for about 8 hours beforehand. Moreover, the doctor will also ask to avoid alcohol or other prescribed drugs before the day of a test, as it will affect the level of enzymes.
- Vitamin B12 test
A blood test also indicates the quantity of vitamins in the blood stream. It can diagnose the particular sort of anemia or any other illness. Certain medications will interfere with the blood reports. Typical fasting time for this test is 6 to 8 hours.
- Basic or comprehensive metabolic panel
This is basically the part of routine physical tests and assesses the blood sugar, kidney and liver functioning, fluid and electrolyte balance. This is a comprehensive report which includes detailed information of each element. The quantity of most of the elements are affected by the intake of drugs or any food, so doctors ask people to avoid eating before going for a test.
- Iron Tests
Typical fasting time for iron tests is 12 hours. This test is conducted to identify the level of iron in the blood which might be too low or too high.