Ulcerative colitis (UC) and Crohn's disease (CD) exemplify the two main arms of the spectrum of an idiopathic chronic disease known as inflammatory bowel disease (IBD). To date, this disease remained a puzzling dilemma in many aspects; including difficulties in its etiology/pathogenesis, diagnosis, severity assessment, treatment and outcomes/complications. Physicians usually get the diagnosis of IBD through a combination of clinical features, laboratory tests, radiology, as well as the invasive technique of endoscopy/biopsy. In spite of these efforts, the definite diagnosis can't be established in a significant cohort of cases. This paved the way to searching for laboratory biomarkers that are noninvasive, reproducible, rapid and relatively cheap than other modalities. Unfortunately, we're still far from these ideal biomarkers. Some biomarkers are already being used in daily practice including C-reactive protein (CRP) and fecal calprotectin while others are still in need for confirmation before being applied in clinical practice. In this review article, the authors are going to discuss the past, present, and future utility of biomarkers in IBD. This article aims at highlighting the uses and limitations of all possible current and novel biomarkers in every aspect of the disease from predisposition to prognosis.