Smoking, Nicotine Exposure and Blood Glucose Regulation: A Scientific Review of Insulin Resistance, Type 2 Diabetes Risk and the Metabolic Effects of Smoking Cessation

Abstract

This research paper explores the physiological and metabolic impact of tobacco smoking and nicotine exposure on blood glucose homeostasis. It reviews the pathophysiological pathways through which acute and chronic nicotine consumption induces insulin resistance, alters glucose metabolism, and elevates the risk of developing type 2 diabetes mellitus. The study details both central and peripheral nervous system mechanisms, highlighting how nicotine interacts with nicotinic acetylcholine receptors to disrupt pancreatic beta-cell function and stimulate counter-regulatory stress hormones like cortisol and adrenaline. Additionally, the paper addresses the clinical implications for diabetic patients who smoke, focusing on increased glycemic variability, accelerated microvascular and macrovascular complications, and potential challenges in standard insulin therapy and medication efficacy. Ultimately, this comprehensive review provides vital insights for clinical endocrinology, public health policy, and targeted smoking cessation strategies aimed at mitigating metabolic disorders