Nutritional significance of finger millet and its potential for using in functional products

Finger millet (Eleusine coracana L.), ragi or mandua, is one of essential minor millets extensively grown in the Indian and African subcontinents. It is a staple food in India, particularly for people belonging to low-socioeconomic groups. Finger millet is highly valued for its content of macro- and micronutrients. It is rich in carbohydrates, protein, and fat. Its micronutrients include calcium (0.38%), dietary fiber (18%), and phenolic compounds (0.3-3%), such as catechin, epicatechin, as well as ferulic, salicylic, protocatechuic, cinnamic, and hydroxybenzoic acids, etc. Finger millet is also recognized as a source of vital amino acids, including isoleucine, leucine, methionine, and phenylalanine, which are otherwise deficient in starchy meals. In addition, finger millet is well appreciated for its pharmacological properties such as anti-diabetic, anti-tumorigenic, anti-atherosclerogenic, antioxidant, and antimicrobial effects. To improve its nutritional and sensory properties, this grain can be processed by various traditional and advanced methods (soaking, malting, cooking, fermentation, popping, and radiation). These processing techniques equally assist in the reduction of anti-nutritional factors (tannins, phytic acid, oxalic acid, protein inhibitors, glucans) and their inhibitory effects. In this review, we highlighted the nutritional composition, health attributes, and uses of finger millet for the development of functional food products. Researchers and producers can further explore the opportunities and scope for utilizing finger millet and develop more products in the same line to solve the current issues of food and nutrition security.