Diabetes mellitus is a complex metabolic disorder characterized by persistent hyperglycemia and progressive alterations in multiple physiological pathways, which may ultimately contribute to microvascular and macrovascular complications. The multifactorial nature of diabetes has increased interest in therapeutic approaches capable of influencing multiple biological targets simultaneously. Among traditional Ayurvedic preparations, Madhumehari Churna, a polyherbal formulation comprising twelve medicinal botanicals, has traditionally been used in the management of Prameha and diabetes-related disorders. This review critically examines the available evidence concerning its phytochemical composition, proposed pharmacological mechanisms, therapeutic potential, and safety considerations. The constituent botanicals of Madhumehari Churna contain diverse classes of bioactive compounds, including flavonoids, phenolic acids, tannins, alkaloids, terpenoids, triterpenoids, saponins, glycosides, polysaccharides, and dietary fibres. Experimental studies of its individual constituents suggest potential effects on carbohydrate digestion and absorption, insulin secretion and sensitivity, glucose utilization, lipid metabolism, oxidative stress, and inflammatory signaling. These findings provide a pharmacological rationale for the traditional use of the formulation; however, an important proportion of the available mechanistic evidence is derived from individual herbs or their phytoconstituents rather than from the complete Madhumehari Churna formulation. Therefore, the reported activities should be interpreted as potentially complementary pharmacological effects rather than established synergistic actions. Available clinical evidence remains limited and is characterized by variation in study design, formulation, dosage, treatment duration, and outcome assessment. Similarly, formulation-specific toxicological, pharmacokinetic, and standardization data are comparatively scarce. Further well-designed preclinical investigations and adequately powered clinical studies, together with systematic quality-control and phytochemical standardization, are required to establish the efficacy, safety, reproducibility, and clinical relevance of Madhumehari Churna in diabetes management. Such evidence will help determine its potential role as a multi-component therapeutic approach within contemporary diabetes care.