Depening on your health condition and medical history, your doctor might might ask you to fast overnight before going in for the test. It not prescibed to every patient going for the test. Also, avoid intake of any vitamins or supplements and birth control pills before the test.
Treatment will be recommended by your doctor according to your test result.
Besides that, you can take a few preventive measures yourself to improve your test.
People with symptoms of malnutritions should take more of:
whole fruits and vegetables like leafy greens, citrus fruits and more in their diet
Whole grain cereals
protein-based diets such as meat and fish
When found infected with any liver or gall bladder disease, the doctor will prescribe medications that should be taken regularly without fail.
When you are detected with cancer, the doctor will prescribe for chemotherapy as well.