Diabetes has emerged as one of the most serious public health challenges in India. Often referred to as a “silent disease,” diabetes can damage the heart, kidneys, eyes, nerves, and blood vessels long before symptoms become noticeable. India is currently home to one of the largest populations of people with diabetes worldwide, earning it the unfortunate label of the “diabetes capital of the world”.

Understanding why diabetes is rising so rapidly in India—and how it can be prevented or controlled—is essential for individuals, families, and communities.

What Is Diabetes?

Diabetes mellitus is a metabolic disorder characterised by persistently elevated blood glucose levels. Type 2 diabetes, which accounts for more than 90% of cases, develops due to a combination of insulin resistance and progressive failure of insulin secretion from the pancreas.

In the early stages, insulin resistance forces the pancreas to produce more insulin. Over time, pancreatic beta cells become exhausted, leading to sustained hyperglycaemia and systemic organ damage.

Why Is Diabetes So Common in India?

Genetic Susceptibility

South Asians are genetically predisposed to insulin resistance and central obesity, even at lower body mass index (BMI) levels compared to Western populations. This phenomenon, often called the “thin–fat Indian,” explains why diabetes occurs even in individuals who do not appear overweight.

Lifestyle Changes

Rapid urbanisation has led to:

• Sedentary work culture
• High intake of refined carbohydrates and sugars
• Reduced physical activity
• Chronic stress and poor sleep

These factors accelerate insulin resistance and weight gain.

Early Age of Onset

Unlike Western populations, diabetes in Indians often begins 10–15 years earlier, increasing lifetime risk of complications such as heart disease and kidney failure.

The Hidden Phase: Why Many Indians Don’t Know They Have Diabetes

Large population studies show that nearly 50% of Indians with diabetes remain undiagnosed. This is because early diabetes often causes no symptoms. During this silent phase:

• Blood vessels are damaged
• Nerves begin to degenerate
• Kidney filtration declines
• Retinal damage starts

By the time symptoms appear, irreversible complications may already be present.

Complications of Uncontrolled Diabetes

Cardiovascular Disease

Diabetes doubles to triples the risk of heart attack and stroke by accelerating atherosclerosis.

Kidney Disease

Chronic hyperglycaemia damages kidney filtration units, leading to diabetic nephropathy—the leading cause of end-stage kidney disease worldwide.

Eye Damage

Diabetic retinopathy is a major cause of preventable blindness and often progresses silently.

Nerve Damage

Peripheral neuropathy causes numbness, pain, and foot ulcers, increasing the risk of amputations.

How Is Diabetes Diagnosed?

Diabetes is diagnosed using:

• Fasting plasma glucose
• HbA1c (reflects 3-month average glucose)
• Oral glucose tolerance test

HbA1c ≥6.5% confirms diabetes, while values between 5.7–6.4% indicate prediabetes.

Can Diabetes Be Prevented?

Yes—especially in the early stages.

Large clinical trials have shown that lifestyle intervention can reduce progression from prediabetes to diabetes by over 50%. Key strategies include:

• 150 minutes of moderate exercise per week
• Balanced diet with reduced refined carbohydrates
• Weight loss of 5–7%
• Adequate sleep and stress management

Managing Diabetes Effectively

Diabetes management involves:

• Lifestyle modification
• Oral medications and/or insulin
• Regular monitoring of blood sugar, blood pressure, and cholesterol

Early and tight glucose control significantly reduces long-term complications, a concept known as “metabolic memory”.

Conclusion

Diabetes in India is rising rapidly due to a combination of genetic vulnerability and modern lifestyle changes. However, diabetes is largely preventable and controllable when detected early.

Awareness, regular screening, and timely intervention can dramatically reduce complications and improve quality of life. Taking action today can prevent irreversible damage tomorrow.

References (Vancouver Style)

1. International Diabetes Federation. IDF Diabetes Atlas, 10th ed. Lancet Diabetes Endocrinol. 2021;9(10):653–654.
2. American Diabetes Association. Standards of care in diabetes—2024. Diabetes Care. 2024;47(Suppl 1):S1–S350.
3. DeFronzo RA. Pathogenesis of type 2 diabetes mellitus. Med Clin North Am. 2004;88(4):787–835.
4. Misra A, Shrivastava U. Obesity and dyslipidaemia in South Asians. Lancet Diabetes Endocrinol. 2013;1(2):161–172.
5. Hu FB. Globalization of diabetes. N Engl J Med. 2011;365(14):1334–1336.
6. Mohan V, Deepa R. Epidemiology of diabetes in India. J Assoc Physicians India. 2006;54:173–180.
7. Anjana RM, et al. Prevalence of diabetes in India: ICMR–INDIAB study. Lancet Diabetes Endocrinol. 2017;5(8):585–596.
8. Nathan DM. Long-term complications of diabetes mellitus. N Engl J Med. 1993;328(23):1676–1685.
9. Haffner SM, et al. Mortality from coronary heart disease in diabetics. N Engl J Med. 1998;339(4):229–234.
10. Alicic RZ, Rooney MT, Tuttle KR. Diabetic kidney disease. Clin J Am Soc Nephrol. 2017;12(12):2032–2045.
11. Cheung N, Mitchell P, Wong TY. Diabetic retinopathy. Lancet. 2010;376(9735):124–136.
12. Boulton AJM. Diabetic neuropathy. N Engl J Med. 2005;352(6):601–610.
13. Knowler WC, et al. Diabetes Prevention Program. N Engl J Med. 2002;346(6):393–403.
14. Holman RR, et al. Legacy effect of early glucose control. N Engl J Med. 2008;359(15):1577–1589.