Dr. Isreb- The Integrative Nephrologist

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Dr. Isreb- The Integrative Nephrologist Specializing in integrative kidney therapies, Nephrology, Hypertension, Dialysis and Transplant

What does integrative nephrology actually mean?It does NOT mean replacing proven kidney care with supplements, restricti...
10/24/2026

What does integrative nephrology actually mean?

It does NOT mean replacing proven kidney care with supplements, restrictive diets, or unproven “natural” treatments.

Integrative nephrology begins with accurate diagnosis, established kidney-protective therapies, and careful monitoring. It then expands the clinical lens to consider the interconnected factors that may influence kidney health.

Our newly updated cornerstone article explores six essential areas:

🧬 Genetics and epigenetics
🥗 Nutrition and metabolic health
🏃 Lifestyle, sleep, and stress physiology
🌎 Environmental exposures
🦠 The gut–kidney connection
💊 Pharmaceuticals, supplements, and precision prescribing

The article also examines where the evidence is strong, where the science is still emerging, and what integrative nephrology can—and cannot—realistically promise.

The goal is not to order every available test or build a complicated protocol. It is to identify what matters for the individual patient and translate that understanding into safe, practical, measurable care.

Integrative nephrology is not alternative nephrology. It is evidence-based kidney care practiced with a wider lens.

Read What Is Integrative Nephrology? A Systems-Based Approach to Modern Kidney Care" through the link in our bio.

https://inkidney.com/integrative-nephrology/

Not all kidney stones are the same—and recurrent stones beginning early in life may point to an inherited disorder. 🧬🪨Cy...
10/23/2026

Not all kidney stones are the same—and recurrent stones beginning early in life may point to an inherited disorder. 🧬🪨

Cystinuria occurs when genetic changes impair the kidney’s ability to reabsorb cystine. Excess cystine remains in the urine, where it can crystallize and form stones that are often recurrent, difficult to dissolve, and challenging to manage.

Because the underlying condition is lifelong, treatment should focus on preventing new stones—not only removing stones after they form. 🫘

The main strategies include:

💧 Producing enough urine to dilute cystine. Many adults need a high urine output, but fluid targets must be individualized.

🧪 Raising urine pH. Cystine is more soluble in alkaline urine, so potassium citrate or another prescribed therapy may be needed. Excessive alkalinization can promote calcium phosphate stones, making monitoring essential.

🥗 Moderating—not eliminating—protein. Excess protein, particularly from animal sources, may increase urinary cystine. Extreme protein restriction is not the goal.

🧂 Reducing excess sodium. This supports blood-pressure and kidney health and remains part of comprehensive stone prevention.

🔍 Using objective follow-up. Stone analysis, urine pH, imaging, kidney function, and 24-hour urine testing help determine whether the plan is working.

Genetic testing may help confirm the diagnosis, inform family counseling, and identify relatives who could benefit from earlier evaluation.

Cystinuria is genetic, but genes do not determine the entire course. Hydration habits, urine chemistry, nutrition, medication, and consistent monitoring can influence stone risk. 🌱

Read “Integrative Approach to Cystinuria: Nutrition, Genetics, and Kidney Stone Prevention” through the link in our profile. 🔗
https://inkidney.com/integrative-approach-to-cystinuria-nutrition/

Cystatin C is often described as a cleaner alternative to creatinine because it is less affected by muscle mass.But it i...
10/22/2026

Cystatin C is often described as a cleaner alternative to creatinine because it is less affected by muscle mass.

But it is not immune to outside influences. 🧪🫘

A 2026 study evaluated 5,595 adults who had kidney filtration measured directly with iohexol clearance. After accounting for measured GFR and other clinical factors, systemic glucocorticoids were associated with higher cystatin C—especially at higher doses.

In other words, prednisone, methylprednisolone, and similar medications may increase cystatin C production even when true kidney filtration has not declined. 💊

That matters because cystatin C-based eGFR may then make kidney function appear worse than it is.

This is particularly relevant in people receiving steroids for glomerulonephritis, lupus nephritis, vasculitis, or other inflammatory kidney diseases—exactly when kidney function is often being monitored closely.

If cystatin C rises during steroid treatment, several explanations are possible:

• kidney filtration has truly worsened
• steroids have increased cystatin C production
• inflammation or illness is affecting the marker
• more than one factor is occurring at the same time 🔍

My takeaway:

Do not ignore an elevated cystatin C—but do not interpret it in isolation either.

Review the steroid dose and timing, compare creatinine- and cystatin C-based estimates, consider the combined creatinine–cystatin C equation, and look at urine findings, blood pressure, volume status, and disease activity. In selected cases, measured GFR may be useful when the answer would change management. 🩺

One abnormal biomarker does not interpret itself. Context matters.

Read my full article, “High Cystatin C With Steroids: Why Kidney Function May Look Worse Than It Is,” through the link in my profile. 🔗

https://inkidney.com/high-cystatin-c-with-steroids-why-kidney-function-may-look-worse-than-it-is/

Stress is not “just emotional.” It produces measurable biological changes throughout the body—including pathways that af...
10/21/2026

Stress is not “just emotional.” It produces measurable biological changes throughout the body—including pathways that affect the kidneys. 🧠🫘

During a short-term threat, activation of the stress response is adaptive. But when that response remains switched on, persistent activation of the sympathetic nervous system and HPA axis may contribute to:

• higher blood pressure and reduced nighttime dipping
• activation of the renin–angiotensin–aldosterone system
• sodium retention and changes in kidney blood flow
• insulin resistance and metabolic dysfunction
• inflammation, oxidative stress, and poor sleep 🔄

These pathways are all relevant to kidney and cardiovascular health.

Research has also linked depression, anxiety, trauma exposure, and social isolation with worse outcomes in people with CKD. These associations do not prove that stress alone causes kidney disease, but they remind us that emotional health and kidney health are not separate systems. 🔍

Addressing stress should never replace established CKD care, including blood-pressure control, diabetes management, appropriate medications, nutrition, and regular monitoring. It can, however, become part of a more complete plan.

Helpful strategies may include slow diaphragmatic breathing, mindfulness, regular physical activity, time in nature, yoga or tai chi, improved sleep, counseling, and HRV biofeedback when appropriate. 🌿🧘

The goal is not to tell people to “just relax.” It is to recognize chronic stress as a physiological burden and offer practical, individualized support.

Protecting kidney health also means caring for the nervous system. 🩺

Read “Stress-Response Kidney Disease: How Chronic Stress Rewires the Kidneys Through the HPA Axis” through the link in our profile. 🔗
https://inkidney.com/stress-response-kidney-disease/

We usually think of phosphate accumulation in CKD as a kidney problem: as kidney function declines, the body becomes les...
10/20/2026

We usually think of phosphate accumulation in CKD as a kidney problem: as kidney function declines, the body becomes less able to eliminate phosphate.

But what if CKD also changes the intestine so that more phosphate enters the body?

That is what caught my attention in this new experimental study. 🔬

In healthy mice, changing dietary phosphate did not significantly alter passive phosphate movement between intestinal cells.

In a mouse model of CKD, however:

• active phosphate transport failed to decrease appropriately despite hyperphosphatemia
• passive phosphate absorption through the intestinal barrier increased
• claudin-3 and claudin-7—proteins involved in maintaining intestinal tight junctions—became mislocalized

The researchers then exposed cultured human intestinal cells to p-cresol, a gut-derived uremic toxin. Phosphate permeability increased.

This suggests a potentially important feedback loop:

Declining kidney function → accumulation of uremic toxins → disruption of the intestinal barrier → increased phosphate absorption → greater phosphate burden 🔄

As an integrative nephrologist, I find this particularly interesting because it challenges a kidney-centered view of mineral metabolism. The kidneys remain central, but the intestinal barrier and gut-derived metabolites may also influence the problem.

This could eventually open the door to treatments that target intestinal permeability, uremic toxins, or specific phosphate-transport pathways—not simply dietary phosphate intake or phosphate binders.

But we are not there yet.

This was preclinical research involving mice and cultured cells. It does not prove that probiotics, prebiotics, supplements, or other microbiome interventions will lower phosphate or improve outcomes in people with CKD.

My takeaway:

The gut is not merely where phosphate enters the body. In CKD, it may become an active participant in disturbed phosphate balance.
Read the study through the link in my profile. 🔗

Testosterone is often discussed as a possible contributor to kidney-function decline in men. But before accepting that c...
10/19/2026

Testosterone is often discussed as a possible contributor to kidney-function decline in men. But before accepting that conclusion, I want to know how kidney function was measured. 🧪🫘

Creatinine-based eGFR can be misleading in people with greater muscle mass because muscle increases creatinine production—even when true filtration has not changed. 💪

A longitudinal study addressed that problem by using iohexol clearance to measure GFR directly.

Researchers followed 800 men, ages 50–62, from the general population. At baseline, they did not report diabetes, cardiovascular disease, or kidney disease. Kidney filtration was measured up to three times over a median of 10.9 years.

The researchers examined total testosterone, free testosterone, and s*x hormone–binding globulin, or SHBG.

What did they find? 🔍

• Higher total testosterone and SHBG were associated with slightly higher measured GFR at baseline
• Total testosterone was not associated with faster measured GFR decline
• Free testosterone was not associated with faster measured GFR decline
• SHBG was not associated with faster measured GFR decline ✅

This study did not support the hypothesis that naturally occurring testosterone levels accelerate age-related loss of kidney filtration in generally healthy middle-aged men.

My takeaway:

Measurement method matters. A higher creatinine—or lower creatinine-based eGFR—does not always mean the kidneys are filtering less. Muscle mass, diet, supplements, medications, and other non-kidney factors can influence the number. 🧠

This is why I sometimes use cystatin C or measured GFR when creatinine does not fit the clinical picture.

But this study evaluated naturally occurring hormone levels—not testosterone-replacement therapy, anabolic steroid use, supraphysiologic doses, or men with established CKD. ⚠️

The finding is reassuring, but it is not a blanket statement that every form or dose of testosterone is kidney-safe.

Interpret the patient—not one laboratory value. 🩺

Read the full study through the link in my profile. 🔗
https://doi.org/10.1016/j.kint.2026.07.030

Not all kidney stones are the same—and when stones begin early in life or keep returning, I start asking whether we are ...
10/18/2026

Not all kidney stones are the same—and when stones begin early in life or keep returning, I start asking whether we are dealing with an inherited disorder. 🧬🪨

Cystinuria is caused by genetic changes that impair the kidney’s ability to reabsorb cystine. The excess cystine remains in the urine, where it can crystallize into stones that are often recurrent, difficult to dissolve, and challenging to manage.

This is not a condition we should treat only when a stone causes pain or obstruction.

The goal is lifelong prevention. 🫘

The most important strategies are:

💧 Produce enough urine to dilute cystine. Many adults need a urine output of at least 3 liters daily, but the target should be individualized.

🧪 Keep cystine dissolved by raising urine pH. Potassium citrate or another prescribed therapy is often needed. More alkalinization is not always better—excessively high urine pH can promote calcium phosphate stones.

🥗 Moderate—not eliminate—protein. A 2025 study involving 41 adults found that higher protein intake was associated with higher urinary cystine excretion. Extreme restriction is not the answer, but high-protein dietary patterns may work against prevention.

🧂 Reduce excess sodium for blood pressure, kidney health, and broader stone prevention.

🔍 Monitor objectively with stone analysis, imaging, kidney function, urine pH, and 24-hour urine testing.

Genetic testing can help confirm the diagnosis, guide family counseling, and identify relatives who may benefit from earlier evaluation.

My takeaway:

Cystinuria is genetic, but genes do not determine the entire course. Hydration habits, urine chemistry, nutrition, medication, and consistent monitoring can meaningfully influence stone risk. 🌱

The two priorities remain simple: produce enough urine and keep cystine dissolved.

Read my full article through the link in my profile. 🔗



https://inkidney.com/integrative-approach-to-cystinuria-nutrition/

Creatine raised your creatinine. Does that mean your kidneys were damaged? Not necessarily. 💪🫘This is an important disti...
10/17/2026

Creatine raised your creatinine. Does that mean your kidneys were damaged? Not necessarily. 💪🫘

This is an important distinction because creatine is converted into creatinine—the same blood marker commonly used to estimate kidney function.

After starting a creatine supplement, serum creatinine may rise because the body is producing more creatinine. That can make a creatinine-based eGFR appear lower even when filtration has not meaningfully changed. 🧪

Before assuming kidney injury, I look at three things:

1️⃣ Urinalysis and uACR

Blood, protein, or albumin in the urine may point toward actual kidney damage. A normal urine evaluation provides important context.

2️⃣ Cystatin C–based kidney function

Cystatin C is not affected by creatine metabolism in the same way. Comparing creatinine- and cystatin C–based estimates can help clarify whether filtration has truly declined. 🔍

3️⃣ Dose, duration, and kidney history

Recommended doses appear generally well tolerated by healthy adults, but that does not make creatine appropriate for everyone. High doses, prolonged use, pre-existing CKD, dehydration, and other medications or supplements can change the risk. ⚠️

Sometimes additional testing or repeating the labs after holding the supplement may be appropriate. No kidney marker should be interpreted in isolation.

My takeaway:

A higher creatinine after starting creatine is a signal to investigate—not proof of kidney damage and not something to dismiss automatically. The pattern of results matters more than one number. 🩺

Read my full article, “The Effects of Creatine Supplements on the Kidneys,” through the link in my profile. 🔗
https://inkidney.com/the-effects-of-creatine-supplements-on-the-kidneys/

One of the most common misunderstandings I encounter is that dialysis completely replaces failed kidneys.It does not—but...
10/16/2026

One of the most common misunderstandings I encounter is that dialysis completely replaces failed kidneys.

It does not—but that does not make it any less life-saving. 🫘🩺

Healthy kidneys work continuously, 24 hours a day. They remove waste and excess fluid while regulating electrolytes, acid–base balance, blood pressure, red blood cell production, and vitamin D activation.

Conventional in-center hemodialysis is typically performed three times per week for several hours. When averaged over time, it provides only about 10–15% of normal kidney clearance. Fluid and waste accumulate between treatments and are then removed during a relatively short session. ⏱️

Peritoneal dialysis provides a similar overall level of clearance but works daily, creating steadier shifts in fluid and solutes. More frequent or longer home hemodialysis can also provide greater and more continuous clearance than conventional treatment.

This is why I emphasize two things:

💧 Preserve residual kidney function whenever possible. Even a small amount of natural function can contribute meaningfully to fluid balance, toxin removal, and quality of life.

🔄 Individualize the dialysis prescription. The best modality and schedule depend on medical needs, lifestyle, treatment goals, home support, and what matters most to the patient.

A “good” dialysis adequacy number does not mean that dialysis has reproduced everything the kidneys do. Standard measurements largely evaluate the removal of selected small solutes—not the kidneys’ full hormonal, metabolic, tubular, and regulatory functions.

My takeaway:

Dialysis is not an artificial kidney. It is a treatment that replaces part of kidney function—and saves lives while doing it. 💙

Understanding its strengths and limitations supports better conversations about home therapies, preserving residual function, transplantation, symptom management, and truly individualized kidney care.

Read my article through the link in my profile. 🔗
https://inkidney.com/how-much-kidney-function-does-dialysis-really-replace/

When we assess risk in chronic kidney disease, we rely heavily on eGFR, albuminuria, and cardiovascular risk factors. Bu...
10/15/2026

When we assess risk in chronic kidney disease, we rely heavily on eGFR, albuminuria, and cardiovascular risk factors. But do these measurements capture the biological picture? 🧐🫘

A large prospective study explored whether metabolomics—the measurement of small molecules in the blood—could improve mortality prediction in CKD.

Researchers analyzed 143 plasma biomarkers in 16,306 UK Biobank participants with CKD, including lipoprotein particles, fatty acids, amino acids, triglycerides, and the inflammatory marker GlycA. 🔬

Of these biomarkers:

• 122 were associated with all-cause mortality
• 90 were associated with cardiovascular mortality ❤️
Adding selected markers to a conventional model modestly improved prediction:
• all-cause mortality C-index: 0.729 to 0.750
• cardiovascular mortality C-index: 0.761 to 0.770 📈

I find this interesting because it supports something I emphasize often: CKD is not simply a filtration disorder.

It affects—and is affected by—lipid and amino-acid metabolism, inflammation, nutrition, cardiovascular health, and other interconnected systems. Metabolomics may eventually reveal patterns that routine tests miss. 🧠

But the findings require caution. ⚠️

This observational analysis cannot show that any individual metabolite causes better or worse outcomes. Some counterintuitive associations—such as certain LDL, VLDL, or branched-chain amino-acid measures being linked with lower mortality—could reflect nutrition, inflammation, disease severity, altered kidney clearance, or reverse causation.

This is not evidence that people with CKD should raise their LDL or take branched-chain amino-acid supplements.

The improvement in prediction was modest, particularly for cardiovascular mortality, and the model requires validation in more diverse populations.

My takeaway:

This is promising precision-medicine research—not a test ready for routine care. In the future, CKD assessment may move beyond isolated numbers toward a more complete metabolic profile of the individual patient. 🧬🎯

Read the study through the link in my profile. 🔗

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