Type 2 Diabetes Mellitus: A Comprehensive Review of Epidemiology, Pathophysiology, Clinical Management and Homoeopathic Perspective

Abstract

Type 2 Diabetes Mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic ?-cell dysfunction, posing a major global health burden. The increasing prevalence of T2DM is associated with genetic factors, obesity, sedentary lifestyle, unhealthy dietary habits, and psychosocial determinants. The disease contributes significantly to morbidity and mortality through its microvascular and macrovascular complications[1,2]. This review aims to provide a comprehensive overview of the epidemiology, pathology, clinical features, diagnosis, and management of T2DM. [1,4] The underlying pathophysiological mechanisms, including insulin resistance, inflammation, and impaired glucose metabolism, are discussed. Conventional management strategies such as lifestyle modification, pharmacological treatment, and long-term monitoring are also highlighted. [1] From a Homoeopathic perspective, emphasis is placed on individualization, constitutional assessment, and totality of symptoms. Homoeopathy considers psychological, environmental, and susceptibility factors influencing disease expression. [7,8,9 ]An integrated and patient-centered approach may support comprehensive care and improve quality of life in individuals with T2DM.

Introduction

Type 2 Diabetes Mellitus (T2DM) is a chronic metabolic disorder characterized by persistent high blood glucose levels due to insulin resistance and inadequate insulin secretion by pancreatic β-cells. It accounts for 90–95% of all diabetes cases worldwide and has become a major public health challenge. Risk factors include genetic predisposition, obesity, physical inactivity, unhealthy diet, aging, smoking, hypertension, dyslipidemia, and environmental influences. The disease causes significant healthcare costs and complications, making prevention, early diagnosis, and effective management essential.

From a homoeopathic perspective, T2DM is viewed as a constitutional disorder requiring individualized treatment based on the patient's physical, mental, and emotional characteristics, alongside lifestyle modifications and holistic care.

Objectives of the Review

The review aims to:

• Provide an overview of T2DM.
• Discuss its epidemiology, risk factors, pathophysiology, and clinical features.
• Review diagnostic criteria and conventional treatment.
• Explore homoeopathic approaches and commonly used remedies.
• Emphasize integrated, patient-centered care.

Epidemiology and Burden

T2DM is increasing rapidly worldwide due to urbanization, sedentary lifestyles, and dietary changes.

• Global prevalence has risen significantly, with hundreds of millions affected.
• By 2024, over 800 million adults were estimated to have diabetes globally.
• India is among the countries with the highest diabetes burden, with increasing prevalence in both urban and rural populations.
• South Asians are particularly susceptible, often developing diabetes at a younger age.

Risk Factors

Non-modifiable Factors

• Advancing age
• Family history of diabetes
• Ethnic predisposition
• History of gestational diabetes

Modifiable Factors

• Obesity (especially abdominal obesity)
• Physical inactivity
• Unhealthy diet
• Smoking
• Excessive alcohol intake
• Hypertension
• Dyslipidemia

Public Health Importance

T2DM contributes significantly to disability, healthcare expenditure, and mortality. It is associated with serious complications such as:

• Cardiovascular disease
• Kidney disease (nephropathy)
• Eye disease (retinopathy)
• Nerve damage (neuropathy)
• Lower limb amputations

Public health efforts focus on prevention, lifestyle interventions, early diagnosis, and patient education.

Glucose Homeostasis

Blood glucose levels are mainly regulated by:

• Insulin (produced by pancreatic β-cells), which lowers blood glucose by promoting glucose uptake, glycogen storage, protein synthesis, and fat storage.
• Glucagon (produced by α-cells), which raises blood glucose by stimulating glycogen breakdown and glucose production.

Other hormones such as cortisol, growth hormone, catecholamines, and thyroid hormones oppose insulin action and help regulate glucose levels.

Classification of Diabetes

According to the ADA, diabetes is classified into:

1. Type 1 Diabetes Mellitus
2. Type 2 Diabetes Mellitus
3. Gestational Diabetes Mellitus
4. Other specific forms (genetic, pancreatic, endocrine, or drug-induced)

Etiology of T2DM

T2DM results from interactions between genetic susceptibility and environmental/lifestyle factors.

• Multiple genes contribute to insulin resistance and β-cell dysfunction.
• Obesity, inactivity, unhealthy diet, aging, hypertension, PCOS, smoking, and sleep disorders further increase risk.

Pathophysiology

The disease develops through two major defects:

1. Insulin Resistance

Target tissues become less responsive to insulin:

• Muscles: reduced glucose uptake and utilization
• Liver: increased glucose production
• Adipose tissue: increased fat breakdown and free fatty acid release

2. Progressive β-cell Dysfunction

Initially, pancreatic β-cells compensate by producing more insulin (hyperinsulinemia). Over time, factors such as glucotoxicity, lipotoxicity, oxidative stress, amyloid deposition, and genetic influences lead to β-cell failure, resulting in persistent hyperglycemia.

Consequences of Chronic Hyperglycemia

Long-term elevated blood glucose causes:

Microvascular Complications

• Retinopathy
• Nephropathy
• Neuropathy

Macrovascular Complications

• Coronary artery disease
• Stroke (cerebrovascular disease)
• Peripheral arterial disease

Other Complications

• Increased susceptibility to infections
• Poor wound healing
• Diabetic foot problems

Conclusion

Type 2 Diabetes Mellitus is a major public health challenge associated with substantial morbidity and mortality.[1,2] Early diagnosis, appropriate lifestyle changes, regular monitoring, and individualized treatment are essential to achieving optimal outcomes.[1] Conventional therapies remain the cornerstone of management, while homoeopathy may provide supportive holistic care [7,9] when practiced responsibly. An integrative approach focusing on patient education and comprehensive management may contribute to improved quality of life among individuals with Type 2 Diabetes Mellitus.

References

[1] American Diabetes Association Professional Practice Committee. Standards of Care in Diabetes—2025. Diabetes Care. 2025;48(Suppl 1):S1–S350. [2] Magliano DJ, Boyko EJ, IDF Diabetes Atlas Committee. IDF Diabetes Atlas. 11th ed. Brussels, Belgium: International Diabetes Federation; 2025. [3] DeFronzo RA. From the triumvirate to the ominous octet: a new paradigm for the treatment of Type 2 Diabetes Mellitus. Diabetes. 2009;58(4):773–795. [4] Galicia-Garcia U, Benito-Vicente A, Jebari S, et al. Pathophysiology of Type 2 Diabetes Mellitus. Int J Mol Sci. 2020;21(17):6275. [5] Anjana RM, Deepa M, Pradeepa R, et al. Prevalence of diabetes and prediabetes in India: ICMR–INDIAB study. Lancet Diabetes Endocrinol. 2023. [6] Jameson JL, Fauci AS, Kasper DL, Hauser SL, Longo DL, Loscalzo J, editors. Harrison\'s Principles of Internal Medicine. 21st ed. New York: McGraw-Hill Education; 2022. p. 2850-2878. [7] Boericke W. Pocket Manual of Homoeopathic Materia Medica. New Delhi: B Jain Publishers; 2018. P. 589–592, 664–666, 512–515, 541–544. [8] Kent JT. Lectures on Homoeopathic Materia Medica. New Delhi: B Jain Publishers; 2019. P. 793–798, 487–492, 768–773, 590–596. [9] Hahnemann S. Organon of Medicine. 6th ed. New Delhi: B Jain Publishers; 2002. P. 169–220. [10] Allen HC. Keynotes and Characteristics with Comparisons of Some of the Leading Remedies. New Delhi: B Jain Publishers; 2017. P. 268–271, 240–243, 186–189, 48–51.

Copyright

Copyright © 2026 Dr. Laxmi G Tolamatti, Dr. Neeta. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.