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Common Blood Pressure Medication Linked to Worse Kidney Outcomes in Diabetic Patients
Reproduced from original article:
https://articles.mercola.com/sites/articles/archive/2026/09/01/blood-pressure-medication-kidney-risk-type-2-diabetes.aspx
Analysis by Dr. Joseph Mercola September 01, 2026
Story at-a-glance
- A study of more than 31,000 adults with Type 2 diabetes found that a widely prescribed class of blood pressure medications was associated with a 33% higher risk of serious kidney complications, including substantial loss of kidney function, dialysis or transplantation
- The increased kidney risk persisted even though all participants were already taking modern kidney-protective therapies that are considered standard treatment for diabetic kidney disease
- Researchers believe these medications may increase pressure inside the kidneys’ filtering units, exposing already damaged tissue to additional mechanical stress, which may accelerate kidney decline
- High blood pressure not only raises the risk of heart disease but also damages the kidneys over time, making blood pressure control one of the most important strategies for preserving kidney function
- Improving blood sugar control, restoring a healthier sodium-to-potassium balance, reducing chronic stress, optimizing vitamin D levels, and staying physically active may help lower blood pressure naturally and reduce strain on the kidneys
Diabetic kidney disease, characterized by gradual damage to the kidneys caused by persistently elevated blood sugar, often develops silently for years before obvious symptoms appear. Early warning signs include swelling in the feet and ankles, fatigue, changes in urination, and rising blood pressure. Left unchecked, it can progress to kidney failure that requires dialysis or a transplant.
Because high blood pressure speeds that decline, controlling it is considered a cornerstone of treatment, which is what makes research presented at the European Renal Association Congress so unsettling.1 Among adults with Type 2 diabetes who were already taking medications meant to preserve their kidneys, one widely prescribed class of blood pressure medication was linked to worse kidney outcomes rather than better ones.
That result defied what the researchers expected to find. These modern therapies were thought to protect the kidneys well enough to offset any downside of adding another blood pressure drug. Instead, the added risk held, even in patients receiving the very treatments designed to slow kidney decline.
The explanation appears to lie not in the bloodstream at large but inside the kidney’s own filtering machinery, where a medication meant to ease pressure within blood vessels may do the opposite. Understanding how that happens reveals why a drug trusted to protect the circulation can behave so differently once blood reaches the kidney.
Common Blood Pressure Drugs Were Linked to a 33% Higher Risk of Kidney Decline
The study investigated whether dihydropyridine calcium-channel blockers (DCCBs) — a group that includes amlodipine, the most commonly prescribed, along with nifedipine and felodipine — remained safe for people with Type 2 diabetes who were already receiving the newest kidney-protective treatments.2
Researchers analyzed data from 31,031 adults treated between 2016 and 2021. Every participant was already taking both renin-angiotensin system (RAS) inhibitors and sodium-glucose cotransporter-2 (SGLT2) inhibitors, which are considered standard therapies for protecting kidney function in diabetic kidney disease. The researchers wanted to determine whether adding DCCBs influenced long-term kidney outcomes.
• The study compared two large treatment groups — Among the participants, 12,172 people (39.2%) were taking DCCBs while 18,859 people (60%) were receiving other blood pressure medications. Patients were followed for a median of roughly 3.5 years, giving researchers a substantial window to observe changes in kidney health.
For readers already managing diabetes, this makes the findings particularly relevant because DCCBs are commonly prescribed as a second-line treatment when blood pressure remains elevated despite other medications.
• The difference in kidney outcomes was significant — After adjusting for differences in age, health status, and other baseline factors, researchers found that DCCB use was associated with a 33% higher risk of major adverse kidney events (RR 1.33, 95% CI, 1.03-1.73) compared to alternative blood pressure treatments.
The researchers defined these events as either a decline of 40% or more in estimated glomerular filtration rate (eGFR) — the standard test used to measure how efficiently your kidneys filter waste from your blood — or progression to end-stage kidney disease requiring dialysis or a kidney transplant. If you already have diabetes and kidney concerns, those outcomes represent some of the most serious complications physicians try to prevent.
• The findings challenged expectations about modern therapy — According to lead researcher Dr. Timna Agur, the research team originally expected that the kidney-protective effects of SGLT2 inhibitors would offset any concerns associated with DCCBs. Instead, the elevated risk remained. That observation suggests newer therapies did not fully erase the difference researchers observed between treatment strategies.
• Changes in blood flow through the kidney’s filtering structures are a likely mechanism — In diabetic kidney disease, those filters already operate under excessive strain. Researchers believe DCCBs relax the vessel carrying blood into each filtering unit more than the vessel carrying blood out — the reverse of how RAS inhibitors work, which ease pressure by relaxing the outflow vessel. This may result in pressure building inside an already overworked filter.
Imagine increasing water pressure entering a garden hose while partially restricting the exit point. Pressure builds inside the system. Researchers suggest a similar process could occur within the kidney’s delicate filtration network, exposing those structures to greater mechanical stress over time.
• The results raise practical questions about treatment choices — The authors emphasized that this was an observational study, meaning it can’t prove that DCCBs directly caused the poorer outcomes. Other factors could contribute to the differences observed between groups. Even so, Agur noted that “given how commonly these medications are prescribed, any increase in kidney risk could have important implications for large numbers of patients with DKD [diabetic kidney disease].”
For someone living with diabetes, this research highlights the value of understanding not only whether blood pressure is controlled, but also how different treatment approaches affect long-term kidney health. It also creates a simple challenge you can discuss with your physician: review your medication list and ask how each drug fits into your overall kidney-protection strategy rather than assuming all blood pressure medications influence the kidneys in the same way.
How to Lower Blood Pressure Without Adding More Stress to Your Kidneys
High blood pressure doesn’t just affect your heart. Over time, it places tremendous strain on the tiny filtering units inside your kidneys, gradually damaging the structures responsible for removing waste from your blood. While the study itself only compared blood pressure drugs, it’s a reminder that the most durable strategy is to address what drives high blood pressure in the first place.
Because diabetes and high blood pressure frequently develop together, improving blood sugar control often may help improve blood pressure as well. When you combine better metabolic health with proper mineral balance, stress reduction and regular movement, you may help reduce the pressure that contributes to kidney strain and the need for more aggressive treatment. Here are five practical ways to start.
1. Fix your sodium-to-potassium balance with whole foods — The real issue isn’t the salt shaker on your table. It’s the ultraprocessed food that dominates the modern diet. Packaged snacks, fast food, processed meats, and convenience meals deliver large amounts of sodium while providing very little potassium.
Potassium may help relax blood vessels, support healthy fluid balance and make it easier for your body to maintain normal blood pressure.
Important: if your kidney function is already reduced, do not increase potassium without your physician’s guidance — damaged kidneys may not clear it safely, especially alongside RAS inhibitors, and excess potassium can affect heart rhythm. As your diet shifts toward real food, the sodium-to-potassium ratio naturally moves in the right direction, helping reduce strain on both your blood vessels and your kidneys.
2. Stop chasing low-salt numbers and improve diet quality instead — Many people are told that severe salt restriction is the answer to high blood pressure. Aggressively cutting salt can increase stress hormones, raise insulin levels, and make blood pressure regulation more difficult.
Rather than obsessing over sodium numbers, remove the foods that contribute most of the problem: ultraprocessed products loaded with refined carbohydrates, phosphate additives, seed oils, and excess sodium. A diet built around nutrient-dense whole foods may support healthier blood pressure while helping reduce the workload placed on your kidneys every day.
3. Lower the stress signals that keep blood pressure elevated — Your nervous system plays a major role in blood pressure control. When your body remains locked in a chronic stress response, blood vessels constrict and pressure rises. One simple tool is box breathing.
Breathe in for four seconds, hold for four seconds, exhale for four seconds, and hold again for four seconds. Repeat the cycle for 10 minutes daily. Combined with adequate sleep, regular outdoor time and daily movement, this may help calm your nervous system and reduce one of the most overlooked drivers of elevated blood pressure.
4. Optimize vitamin D to support healthy blood vessel function — Vitamin D plays a role in regulating the renin-angiotensin system, one of the primary hormone networks involved in blood pressure control. When vitamin D levels remain low, this system becomes overactive, increasing pressure throughout the vascular system and adding stress to kidney tissue.
Regular sun exposure may support vitamin D production, circulation and cellular energy generation. Aim for a vitamin D level between 60 and 80 ng/mL (150 to 200 nmol/L).
If you still consume significant amounts of seed oils and other sources of linoleic acid (LA), avoid intense sun exposure (10 a.m. to 4 p.m.) until you have substantially reduced those foods for four to six months because stored LA may increase susceptibility to sun-related skin damage. Talk to your healthcare provider about whether vitamin D testing is appropriate for you.
5. Move enough to make your blood vessels healthier — Physical activity remains one of the most effective ways to improve blood pressure naturally. Movement may help improve circulation, support insulin sensitivity, reduce stress, and help maintain a healthy body composition.
If you’re already active, work toward an hour of walking, cycling, swimming, or similar movement most days. If you’re starting from scratch, focus on consistency rather than intensity. Even a 10-minute walk after meals may help improve blood sugar control and support healthier blood pressure.
If you have Type 2 diabetes and currently take a DCCB, the European Renal Association findings make it worthwhile to review your treatment plan with your doctor. Don’t stop any prescribed medication on your own. Instead, discuss whether your current approach remains the best fit for your kidney health and what additional lifestyle changes could help improve blood pressure control over time.
*These findings are drawn from an observational, real-world clinical study. Results may not apply to all individuals, and the study cannot establish that DCCBs directly cause poorer kidney outcomes.
This article is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before making changes to your health regimen.
FAQs About Blood Pressure Medications and Kidney Health in People with Type 2 Diabetes
Q: What did the study find about common blood pressure medications and kidney health?
A: Researchers found that people with Type 2 diabetes who took DCCBs had a 33% higher risk of major adverse kidney events (RR 1.33, 95% CI, 1.03-1.73) compared to those using other blood pressure medications. This increased risk remained even though all participants were already taking modern kidney-protective therapies.
Q: Why might these medications increase the risk of kidney damage?
A: Researchers believe DCCBs may alter blood flow inside the kidneys in a way that increases pressure within the kidneys’ filtering units. Over time, that extra pressure could place additional stress on structures that are already vulnerable to damage from diabetes, which may accelerate the loss of kidney function.
Q: Does this study prove that DCCBs directly cause kidney disease?
A: No. The study was observational, meaning it identified an association rather than proving cause and effect. Other factors could have contributed to the differences seen between treatment groups. However, the findings are important because DCCBs are widely prescribed and the study involved more than 31,000 adults with Type 2 diabetes.
Q: What can I do to lower blood pressure while supporting kidney health?
A: Focus on the factors that drive high blood pressure in the first place. Improving blood sugar control, eating potassium-rich whole foods, reducing ultraprocessed foods, managing stress, maintaining healthy vitamin D levels, and staying physically active all may help support healthier blood pressure and reduce strain on your kidneys.
Q: What if I have Type 2 diabetes and currently take a DCCB?
A: Don’t stop your medication on your own. Instead, review the study findings with your doctor and discuss how your current treatment plan fits into your long-term kidney-protection strategy. Ask whether your blood pressure is being managed in the most kidney-friendly way possible and whether additional lifestyle changes could help reduce your need for more aggressive treatment.
This Silent Health Crisis Is Now Affecting Nearly 800 Million People
Reproduced from original article:
https://articles.mercola.com/sites/articles/archive/2026/08/25/chronic-kidney-disease-worldwide.aspx
Analysis by Dr. Joseph Mercola August 25, 2026
Story at-a-glance
- Chronic kidney disease now affects an estimated 788 million adults worldwide, roughly one in seven adults, making it one of the largest and fastest-growing chronic health challenges on the planet
- Most people with kidney disease are in the early stages and often have no obvious symptoms, allowing damage to progress silently for years before it’s discovered
- Kidney disease extends far beyond the kidneys themselves; impaired kidney function contributes to more than one in 10 cardiovascular deaths worldwide by increasing strain on the heart and blood vessels
- High fasting blood sugar, high blood pressure, and excess body weight were identified as leading contributors to kidney disease-related disability and premature death, highlighting the importance of metabolic health
- Taking action early by improving blood sugar control, supporting healthy blood pressure, eating potassium-rich whole foods, staying physically active, and monitoring kidney function offers the best opportunity to preserve kidney health long term
Chronic kidney disease is a gradual loss of your kidneys’ ability to filter waste, balance fluids, and regulate the minerals your body depends on. What makes it so dangerous is how quietly it begins. Early on, you may notice nothing at all, or you may shrug off vague signs like fatigue, swelling in your legs or feet, or subtle changes in urination. By the time the damage makes itself obvious, much of it has often already been done.
That silence is exactly what makes a recent global analysis so unsettling. Drawing on health data spanning more than three decades and hundreds of countries and territories, researchers set out to measure how far this condition has actually spread, and what they uncovered suggests it has become one of the most widespread chronic threats to human health, with consequences that reach well past the kidneys and into the heart itself.1
The detail that deserves your attention most, though, isn’t the sheer size of the problem. It’s that the majority of people whose kidneys are already in trouble have no idea, because the early stages do their damage without raising an alarm. That gap, between how common this condition has become and how rarely it gets caught in time, is the real story. And it starts with what this landmark analysis revealed about the true scope of the crisis.
Kidney Disease Quietly Became One of the World’s Biggest Health Threats
Published in The Lancet, this global analysis examined chronic kidney disease trends across 204 countries and territories between 1990 and 2023. Researchers drew on published studies, household surveys, treatment registries, and national health records to determine how many adults were affected, how many died from the condition, and which risk factors contributed most heavily to the burden of disease.2
Their findings revealed that chronic kidney disease is no longer a niche medical problem; it’s become one of the largest health challenges facing adults worldwide.
• The number of affected adults more than doubled in three decades — According to the analysis, 788 million adults were living with chronic kidney disease in 2023, compared to 378 million in 1990. Researchers reported that the global prevalence reached 14.2% of adults, meaning roughly one in seven adults now has some level of kidney damage or impaired kidney function.3
For you, that reframes the question — kidney disease is no longer a problem confined to a high-risk few, which means the odds it’s relevant to you personally are higher than you might assume.
• Most people are stuck in the silent stages — The overwhelming majority of cases occurred in stages 1 through 3. These are the earlier phases of kidney disease, when the kidneys still perform much of their job but damage has already begun. Researchers estimated that stage 1 through stage 3 disease accounted for a combined prevalence of 13.9% of adults worldwide.
This matters because early kidney disease rarely causes obvious symptoms. You can feel completely normal while damage progresses in the background. That creates a challenge, but it also creates an opportunity. If you identify the problem early, you have a much larger window to address the factors that drive further decline.
• Kidney disease reaches far beyond the kidneys themselves — The analysis found that chronic kidney disease ranked as the ninth leading cause of death globally in 2023, accounting for approximately 1.48 million deaths. Researchers also calculated that impaired kidney function contributed to 11.5% of cardiovascular deaths worldwide.
Unhealthy kidneys place extra stress on your entire circulatory system. Your kidneys help regulate fluid levels, blood pressure, and numerous chemical signals throughout the body. As kidney function declines, the strain extends to the heart and blood vessels, increasing the likelihood of serious cardiovascular problems.
• Blood sugar emerged as the biggest contributor to kidney-related health loss — When researchers compared risk factors, high fasting blood glucose accounted for the largest share of kidney-related disability-adjusted life years — a measure that combines years lost to illness and to premature death — at 31.9%. High systolic blood pressure (24.5%) and excess body weight (23.5%) followed closely behind, while dietary factors accounted for 17.6%.
Because these figures come from an observational analysis, they show how strongly each factor is associated with kidney-related health loss — not that any one directly causes it. Even so, improving blood sugar control, maintaining healthy blood pressure, and managing excess weight may help address the factors contributing the greatest share of kidney-related health loss worldwide.
• Age dramatically increased the burden, but the trend affected all adults — Researchers observed that both the prevalence and severity of chronic kidney disease rose steadily with age. More advanced stages became increasingly common among older adults, while the contribution of high blood pressure to kidney-related disease burden also increased with advancing age.
Yet the findings were not limited to seniors. The study focused on adults beginning at age 20, highlighting that kidney damage often develops decades before severe symptoms appear. If you think of kidney health as a long-term challenge rather than an old-age problem, you gain a major advantage. Every positive step you take today gives your kidneys a better chance of functioning well years from now.
Support Your Kidney Health and Lower Your Risk
The findings from this global analysis point to a simple reality: Chronic kidney disease rarely begins in the kidneys alone. The biggest contributors were high blood sugar, high blood pressure, and excess body weight. That means the most effective strategy is to address the metabolic and lifestyle factors that place stress on your kidneys year after year.
High blood pressure deserves special attention because it doesn’t just accompany kidney disease — it also contributes to it. Over time, elevated pressure damages the tiny blood vessels inside your kidneys, reducing their ability to filter waste efficiently, while declining kidney function often pushes blood pressure even higher. The earlier you address the factors that strain both your blood vessels and your kidneys, the greater your opportunity to preserve kidney function for decades.
The following strategies are for prevention and early-stage risk reduction; anyone with diagnosed kidney disease should treat potassium, protein, and fluid targets as clinician-directed, because the right numbers flip once function is significantly impaired.
1. Make blood sugar control your first priority — High fasting blood sugar was the largest contributor to kidney disease burden worldwide. When blood sugar remains elevated, excess glucose damages the small blood vessels that allow your kidneys to filter waste effectively. Focus on improving metabolic health with whole foods, adequate protein, and healthy carbohydrates that match your activity level.
For most adults, that means approximately 250 grams of carbohydrates daily, with higher amounts if you’re physically active. Prioritize ripe fruit, root vegetables, and other nutrient-dense carbohydrate sources while eliminating ultraprocessed foods, including seed oils and sugary beverages.
Because protein is essential for maintaining muscle and metabolic health, aim for roughly 0.8 grams of protein per pound (or 1.76 grams per kilogram) of ideal body weight, with approximately one-third coming from collagen-rich sources like slow-cooked meats or bone broth.
2. Improve your blood pressure by improving your metabolism — High blood pressure ranked among the leading contributors to chronic kidney disease worldwide. Yet blood pressure often reflects deeper metabolic problems rather than an isolated condition. Excess weight, poor blood sugar control, chronic stress, and nutrient imbalances all place additional strain on your blood vessels and kidneys.
If you’re carrying excess weight, improving body composition often reduces pressure on both systems simultaneously. Daily movement, strength training, adequate sleep, and stress reduction support healthy blood pressure while helping protect your kidneys from further wear and tear. Even a daily walking routine creates meaningful improvements over time.
3. Restore a healthy sodium-to-potassium balance — Many people focus exclusively on reducing salt, but healthy blood pressure depends heavily on maintaining the proper balance between sodium and potassium. The larger problem is that most dietary sodium comes from ultraprocessed foods that contain very little potassium while delivering excess sugar, phosphate additives, seed oils, and other compounds that increase your kidneys’ workload.
Instead of aggressively restricting salt, focus on removing ultraprocessed foods and replacing them with whole-food potassium sources such as ripe fruit, root vegetables, and well-cooked greens. This strategy supports fluid balance, healthy blood pressure, and kidney function at the same time. It also reduces exposure to additives that place additional stress on kidney tissue.
One important exception: If you already have diagnosed kidney disease, especially stage 3b or beyond, don’t increase dietary potassium without checking with your doctor and knowing your latest labs. Once kidney function is significantly reduced, the kidneys can’t clear potassium efficiently, and too much can become dangerous. The advice to raise potassium applies to prevention and early-stage risk reduction, not to established, more advanced disease.
4. Optimize vitamin D through sensible sun exposure and daily movement — Vitamin D helps regulate the hormonal system that controls blood pressure and fluid balance. When vitamin D levels remain low, that system may become overstimulated, which research has linked to increased tension in your blood vessels and added strain on your kidneys.
Regular sun exposure helps to support vitamin D production, cellular energy generation, and healthy circulation. Aim for a vitamin D level between 60 and 80 ng/mL (150 to 200 nmol/L). If you still consume significant amounts of seed oils and other sources of linoleic acid (LA), avoid intense sun exposure until you have reduced those foods for at least six months.
This is because LA is a polyunsaturated fat that oxidizes easily, builds up in your skin, and increases your risk of skin damage. Pair sunlight with regular movement. An hour of walking, cycling, swimming, or similar activity each day improves circulation, supports healthy blood sugar levels, and reduces pressure on your kidneys’ filtering units. If you’re just getting started, even 10-minute sessions create momentum.
5. Stay hydrated, reduce unnecessary kidney stress, and screen early — For healthy kidneys, hydration helps dilute and remove waste while lowering kidney-stone risk, and thirst is usually a reliable guide. If you’ve been diagnosed with kidney disease, fluid needs can change — sometimes downward — so follow your doctor’s guidance rather than thirst alone.
Pale yellow urine also generally reflects adequate hydration. If you have a history of kidney stones, pay attention to foods high in oxalates, including spinach, sweet potatoes, and figs.
Pairing oxalate-containing foods with calcium-rich foods helps bind oxalates in your digestive tract so fewer reach your kidneys. At the same time, reduce phosphorus from processed foods, colas, and fast-food meats, since excess phosphorus disrupts mineral balance and places additional strain on kidney tissue.
If you have high blood pressure, diabetes, obesity, a family history of kidney disease, or other metabolic risk factors, make kidney screening part of your routine. Ask specifically for two tests: an eGFR (estimated glomerular filtration rate), which estimates how much blood your kidneys filter each minute, and a urine albumin-to-creatinine ratio (uACR), which catches protein leaking through damaged filters — often the earliest warning sign, before eGFR has budged.
Because early-stage kidney disease often produces no symptoms, these simple tests help identify problems long before significant damage occurs.
If you are considering kidney-function or vitamin D testing, talk to your health care provider about whether they’re appropriate for you.
FAQs About Chronic Kidney Disease
Q: What is chronic kidney disease and why is it called a silent health crisis?
A: Chronic kidney disease is a gradual loss of kidney function that often develops without obvious symptoms. Many people remain unaware they have it because early-stage kidney disease rarely causes noticeable problems. By the time symptoms become clear, significant damage has often already occurred.
Q: How common is chronic kidney disease?
A: According to the global analysis published in The Lancet, an estimated 788 million adults were living with chronic kidney disease in 2023. The condition now affects roughly one in seven adults worldwide and has more than doubled in prevalence since 1990.
Q: What are the biggest factors driving chronic kidney disease?
A: The leading contributors identified in the research were high fasting blood sugar, high blood pressure, and excess body weight. These metabolic factors damage the blood vessels that supply the kidneys and increase the strain placed on the kidneys over time.
Q: How does kidney disease affect the rest of the body?
A: Kidney disease affects far more than waste filtration. The kidneys help regulate blood pressure, fluid balance, and numerous chemical signals throughout your body. As kidney function declines, the risk of cardiovascular disease rises substantially. Researchers estimated that impaired kidney function contributes to 11.5% of cardiovascular deaths worldwide.
Q: What are the most important steps to protect kidney health?
A: Focus on addressing the root causes of kidney damage before permanent decline occurs. Maintain healthy blood sugar levels, improve blood pressure through better metabolic health, restore a healthy sodium-to-potassium balance with whole foods, optimize vitamin D through sensible sun exposure and regular movement, stay hydrated, and monitor kidney function early if you have risk factors such as diabetes, obesity, high blood pressure, or a family history of kidney disease.
This article is for informational purposes only and does not constitute medical advice. Consult a qualified health care provider before making changes to your health regimen.