Sprouted grains are gaining attention as a natural and sustainable source of bioactive compounds with potential benefits in managing insulin resistance (IR), a hallmark of obesity-related metabolic disorders. This review aims to synthesize current findings on the biochemical changes induced during grain germination and their relevance to metabolic health. We examined recent in vitro, animal, and human studies focusing on how germination enhances the nutritional and functional properties of grains, particularly through the synthesis of compounds such as γ-aminobutyric acid, polyphenols, flavonoids, and antioxidants, while reducing anti-nutritional factors. These bioactive compounds have been shown to modulate metabolic and inflammatory pathways by inhibiting carbohydrate-digesting enzymes, suppressing pro-inflammatory cytokines, improving redox balance, and influencing gut microbiota composition. Collectively, these effects contribute to improved insulin sensitivity and glycemic control. The findings suggest that sprouted grains serve not only as functional food ingredients but also as accessible dietary tools for preventing or alleviating IR. Their role in delivering multiple bioactive molecules through a simple, environmentally friendly process highlights their promise in developing future nutrition-based strategies for metabolic disease prevention.
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