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 |  |