Tests to be Conducted After an Absolute 12-Hour Fast:
Unless in mandatory situations, it is recommended that samples for all biochemical tests be taken after a 12-hour fast.
Tests that Must Be Conducted After an Absolute 12-Hour Fast:
| Alkaline Phosphatase |
Calcitonin |
| Alkaline Phosphatase Isoenzymes |
Cholesterol (total, LDL, HDL, VLDL) |
| Beta-CrossLaps (Beta-CTx) |
Cortisol |
| Growth Hormone (GH) |
Lipoprotein (a) |
| C-Peptide |
Osteocalcin |
| Zinc |
Parathyroid Hormone (PTH) |
| Iron |
Potassium |
| Folic Acid |
Bile Acids |
| Phosphorus |
Free Fatty Acids (FFA) |
| Gastrin |
Triglycerides |
| Glucose |
Vitamin B12 |
| Homocysteine |
Vitamin D (25-Hydroxy Vitamin D) |
| Insulin |
Vitamin D3 (1,25-Dihydroxy Vitamin D3) |
| Urea |
Vitamin E |
| Breath Test |
|
| Hormone Tests with Rhythmic Secretion and Changing Levels Throughout the Day |
| Cortisol |
Thyroid Hormones |
| ACTH |
Insulin |
| Prolactin |
|