Rice plays an important role in human nutrition and in agricultural practices. There are two cultivated (Oryza sativa and Oryza glaberrima) and 21 wild species of rice. Rice grains are mainly composed of carbohydrates followed by proteins, fat, vitamins, and dietary fibers. Different processing levels categorized rice into varied forms such as paddy rice, brown rice, milled rice, parboiled rice, and enriched rice. These forms have different levels of nutritional components and consumption rate. Rice varieties are often classified into japonica, indica, aromatic, and glutinous types based on their morphological, geographic, and quality attributes. In recent times, many processing methods and technologies have been adopted to improve the quality of rice in order to meet consumer demand.