7 facts about kidneys and diabetes

Understanding the critical connection between blood sugar and kidney health
diabetes
Photo credit: Shutterstock.com / fizkes

Diabetes remains one of the leading causes of kidney complications worldwide, affecting how these vital organs filter waste and maintain fluid balance. Understanding this relationship helps people with diabetes take proactive steps to protect their kidney function and prevent long-term complications.

The filtering function

Each day, healthy kidneys filter roughly 150 quarts of blood, removing waste products and excess fluid from the body. When diabetes interferes with this process, it affects the kidneys’ complex filtering system, particularly the tiny units called nephrons. High blood sugar levels gradually damage these delicate structures, compromising their ability to clean the blood effectively.


This filtering process becomes increasingly important for people with diabetes, as their bodies must work harder to maintain proper blood chemistry and fluid balance. When nephrons sustain damage, they cannot repair themselves, making prevention crucial for long-term kidney health.

The diabetes connection

Nearly half of all kidney failure cases worldwide stem from diabetes complications. The condition, known as diabetic nephropathy, develops when consistently high blood sugar levels damage the blood vessels within the kidneys. This damage occurs gradually, often over many years, but can ultimately lead to complete kidney failure if blood sugar remains uncontrolled.


The progression from early kidney damage to kidney failure typically follows a predictable path, making regular monitoring essential for early intervention. People with diabetes face significantly higher risks of developing kidney problems compared to those without the condition.

Prevention through early detection

Regular screening plays a vital role in preventing severe kidney damage. Two primary tests help monitor kidney function: the urine albumin test, which checks for protein in the urine, and the glomerular filtration rate (GFR) assessment, which measures how well the kidneys filter blood.

These screenings can detect problems years before symptoms appear, allowing for early intervention through lifestyle changes and medication adjustments. The earlier kidney damage is detected, the more options remain available for treatment and prevention of further deterioration.

Blood pressure and kidney health

High blood pressure creates a double threat for people with diabetes, as it can accelerate kidney damage while diabetes simultaneously makes blood pressure harder to control. Maintaining blood pressure below 130/80 mmHg becomes crucial for protecting kidney function.

Medications like ACE inhibitors and ARBs serve dual purposes, helping manage blood pressure while offering additional protection to the kidneys. These medications work by reducing pressure within the kidney’s filtering units and decreasing protein spillage into the urine.

Lifestyle choices matter

Protecting kidney health requires a comprehensive approach to lifestyle management. Blood sugar control remains fundamental, as even short periods of high blood sugar can stress the kidneys. A balanced diet low in sodium, sugar, and unhealthy fats helps maintain both blood sugar and blood pressure levels.

Proper hydration supports kidney function, though the right amount varies for each person. Working with healthcare providers to determine appropriate fluid intake prevents problems from either too little or too much water consumption.

Regular physical activity also plays a crucial role, helping maintain healthy blood sugar levels, blood pressure, and overall circulation to the kidneys. Even moderate exercise, when done consistently, can make a significant difference in kidney health outcomes.

Medication management

Many common medications can affect kidney function, particularly when used regularly or in combination with other drugs. Over-the-counter pain relievers, especially nonsteroidal anti-inflammatory drugs (NSAIDs), may strain the kidneys if used extensively.

People with diabetes need to work closely with their healthcare providers to review all medications, including supplements and over-the-counter products. This collaboration ensures that prescribed treatments for diabetes and blood pressure support rather than compromise kidney function.

Advanced treatment options

For those who develop end-stage kidney failure despite prevention efforts, kidney transplantation offers a potential solution. Modern surgical techniques and improved anti-rejection medications have made transplants increasingly successful, often providing better long-term outcomes than dialysis.

While dialysis remains a life-sustaining option, transplantation can offer greater freedom and improved quality of life. However, the limited availability of donor organs makes early prevention and management of kidney disease even more critical.

Taking action

Understanding the connection between diabetes and kidney health empowers people to take necessary preventive steps. Regular medical check-ups, consistent medication use, and lifestyle modifications all contribute to maintaining kidney function and overall health.

Success in preventing kidney complications requires ongoing attention to blood sugar control, blood pressure management, and overall health maintenance. Small daily choices in diet, exercise, and medication compliance can have significant long-term impacts on kidney health outcomes.

This story was created using AI technology.

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