Molecular Anti-diabetic Potential of Medicinal Plants: A Review

Diabetes mellitus is a chronic metabolic condition characterized by hyperglycemia due to either insulin resistance, lack of insulin production, and/or secretion. The global rates of infection are increasing, especially in low- and middle-income countries; thus, exploring novel and safer therapeutic options has become essential. This review aims to compile and analyze existing data on the anti-diabetic properties of selected medicinal plants, focusing on their phytochemical composition, molecular mechanisms of action, and potential therapeutic roles in glucose homeostasis.

A comprehensive literature search was conducted using databases such as Scopus, ScienceDirect, and Google Scholar. Sixteen medicinal plants traditionally used for diabetes management were identified and examined based on multiple experimental studies.

Phytochemicals such as flavonoids, polyphenols, saponins, and terpenoids from these plants exhibit anti-diabetic effects through multiple mechanisms: modulation of glucose transporters (e.g., GLUT4), activation of insulin signaling pathways (e.g., PI3K/Akt), inhibition of digestive enzymes (e.g., α-amylase, α-glucosidase), promotion of insulin secretion, and mitigation of oxidative stress.

Notably, compounds like quercetin, kaempferol, berberine, and gymnemic acid have shown significant promise.

Medicinal plants present a rich source of bioactive compounds with multi-targeted mechanisms relevant to diabetes management. Further pharmacological investigations are necessary to establish their therapeutic efficacy and safety, enabling the development of phytochemical-based interventions for diabetes.