Anti-Diabetic Activity of Andrographis Paniculata

Andrographis paniculata is a well-known medicinal herb extensively used in traditional systems of medicine, including Ayurveda, Siddha, Unani, and Traditional Chinese Medicine. The plant is recognized for its broad spectrum of pharmacological properties such as antidiabetic, antioxidant, anti-inflammatory, antimicrobial, hepatoprotective, immunomodulatory, and anticancer activities. Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia due to insufficient insulin secretion or insulin resistance. Continuous elevation of blood glucose levels leads to severe complications including nephropathy, neuropathy, retinopathy, cardiovascular diseases, and impaired wound healing. Although synthetic antidiabetic drugs are effective, long-term use often causes adverse effects and drug resistance. Therefore, medicinal plants have gained importance as safer and economical alternatives. Recent pharmacological studies have demonstrated that Andrographis paniculata possesses significant antidiabetic activity due to the presence of biologically active compounds such as andrographolide, flavonoids, alkaloids, tannins, and polyphenols. The plant extract lowers blood glucose levels by stimulating insulin secretion, enhancing glucose uptake, reducing oxidative stress, and inhibiting carbohydrate metabolizing enzymes. Experimental studies using streptozotocin-induced diabetic animal models have confirmed its hypoglycemic and antioxidant properties. Clinical observations also suggest improvement in lipid profile and insulin sensitivity following treatment with Andrographis paniculata. This review focuses on the phytochemistry, mechanisms of action, pharmacological activities, experimental studies, therapeutic applications, and future prospects of Andrographis paniculata in diabetes management.