(2017), suggested that the concept of nutrition is applied for the situation such as vascular health, infection, cancer to modulate the immune system. Koch and Radtke (2018), highlighted that in the immunology, glutamine, arginine, omega three fatty acid, vitamins like B12, zinc are commonly used as immunonutrition to module the immune system. This essay aims to focus on omega-three fatty acid as immunonutrition therapy for the cancer patient.