Formulation and Evaluation of Monk Fruit Extract-Based Zero-Calorie Electrolyte Replenisher Powder: A Novel Functional Formulation

The present study aims to develop and evaluate a natural, zero-calorie electrolyte replenisher formulated using monk fruit extract (Siraitia grosvenorii) as a non-glycemic sweetener. Considering the increasing prevalence of diabetes, obesity, and excessive sugar consumption, this formulation provides a healthier alternative to conventional sugar-based oral rehydration products. A WHO ORS–derived electrolyte composition containing sodium chloride, potassium chloride, trisodium citrate, citric acid, and monk fruit extract was prepared by dry blending and packed in moisture-proof sachets. Physicochemical evaluation demonstrated favorable organoleptic properties, rapid solubility (28 ± 2 s), slightly acidic pH (6.5 ± 0.1), and low moisture content (2.1%), indicating good initial quality. Accelerated stability testing at 40°C/75% RH for 28 days showed a gradual increase in moisture content (up to 3.5%) and mild caking, while pH remained stable (6.4–6.5), confirming the absence of chemical degradation. The results suggest that the formulation is primarily affected by hygroscopicity and requires strong moisture-proof packaging for extended shelf life. Overall, the study demonstrates that monk fruit–sweetened electrolyte powder is a viable, stable, and clean-label alternative suitable for diabetics, ketogenic users, athletes, and general consumers seeking natural, zero-calorie hydration solutions. Further sensory and clinical studies are recommended to optimize taste and validate rehydration efficacy. Keywords: Monk fruit; Mogrosides; Zero-calorie natural sweetener; Electrolyte replenisher; Hydration therapy; Diabetes-friendly formulation