The kidneys are extraordinarily complex organs: they filter 180 liters of plasma daily to produce 1-2 liters of urine, regulate fluid and electrolyte balance, acid-base balance, blood pressure (renin-angiotensin system), production of erythropoiet… Read more.
14 factors with evidence, ordered from highest to lowest effectiveness. Information, not medical advice.
⏱ 3 min read
The kidneys are extraordinarily complex organs: they filter 180 liters of plasma daily to produce 1-2 liters of urine, and they regulate fluid and electrolyte balance, acid-base balance, blood pressure (renin-angiotensin system), production of erythropoietin (which stimulates red blood cells), activation of vitamin D, and elimination of metabolic byproducts and drugs. Chronic kidney disease (CKD) is one of the most prevalent and most underdiagnosed chronic conditions in modern societies, often silent until advanced stages; the two main modern causes are diabetes and hypertension.
Strict blood pressure control: the most important factor. Target < 130/80 in people with CKD.
Glycemic control in diabetes: HbA1c < 7% in general, individualized.
Proteinuria control: ACE inhibitors or ARBs are nephroprotective beyond their antihypertensive effect.
SGLT-2 inhibitors (empagliflozin, dapagliflozin, canagliflozin): demonstrated potent nephroprotection in type 2 diabetes and in non-diabetic CKD according to recent trials.
Not smoking: a risk factor for kidney disease progression.
Healthy weight.
Mediterranean diet.
Adequate hydration (without excess): 1.5-2 liters/day in mild-to-moderate CKD.
This section is SPECIFIC to people with established CKD. In moderate-to-advanced stages (eGFR < 60), nutritional restrictions are individualized by nephrology:
Prevention: - Abundant hydration: 2-3 liters/day to keep urine dilute. - Reduce salt. - Maintain normal dietary calcium intake (restriction paradoxically increases the risk of oxalate stones). - Moderate dietary oxalate (spinach, beets, nuts, black tea) if there are calcium oxalate stones. - Moderate purines if there are uric acid stones. - Potassium citrate: in some cases prescribed by urology.
Edema, persistent foam in the urine (proteinuria), significant changes in the color or amount of urine, low back pain, very high blood pressure, a family history of kidney disease, and poorly controlled or long-standing diabetes are indications for evaluation of kidney function through blood work with eGFR and urine albumin/creatinine ratio.
Long-term kidney health depends mainly on controlling blood pressure and diabetes when present, avoiding chronic NSAIDs and other nephrotoxins, maintaining a healthy weight, not smoking, and a Mediterranean diet with adequate hydration. In people with established CKD, nutritional decisions are individualized by nephrology, and supplements require special caution. The myths that "protein damages the kidneys" do not apply to people with normal kidney function.
⏱ 3 min read
The kidneys are extraordinarily complex organs: they filter 180 liters of plasma daily to produce 1-2 liters of urine, and they regulate fluid and electrolyte balance, acid-base balance, blood pressure (renin-angiotensin system), production of erythropoietin (which stimulates red blood cells), activation of vitamin D, and elimination of metabolic byproducts and drugs. Chronic kidney disease (CKD) is one of the most prevalent and most underdiagnosed chronic conditions in modern societies, often silent until advanced stages; the two main modern causes are diabetes and hypertension.
Strict blood pressure control: the most important factor. Target < 130/80 in people with CKD.
Glycemic control in diabetes: HbA1c < 7% in general, individualized.
Proteinuria control: ACE inhibitors or ARBs are nephroprotective beyond their antihypertensive effect.
SGLT-2 inhibitors (empagliflozin, dapagliflozin, canagliflozin): demonstrated potent nephroprotection in type 2 diabetes and in non-diabetic CKD according to recent trials.
Not smoking: a risk factor for kidney disease progression.
Healthy weight.
Mediterranean diet.
Adequate hydration (without excess): 1.5-2 liters/day in mild-to-moderate CKD.
This section is SPECIFIC to people with established CKD. In moderate-to-advanced stages (eGFR < 60), nutritional restrictions are individualized by nephrology:
Prevention: - Abundant hydration: 2-3 liters/day to keep urine dilute. - Reduce salt. - Maintain normal dietary calcium intake (restriction paradoxically increases the risk of oxalate stones). - Moderate dietary oxalate (spinach, beets, nuts, black tea) if there are calcium oxalate stones. - Moderate purines if there are uric acid stones. - Potassium citrate: in some cases prescribed by urology.
Edema, persistent foam in the urine (proteinuria), significant changes in the color or amount of urine, low back pain, very high blood pressure, a family history of kidney disease, and poorly controlled or long-standing diabetes are indications for evaluation of kidney function through blood work with eGFR and urine albumin/creatinine ratio.
Long-term kidney health depends mainly on controlling blood pressure and diabetes when present, avoiding chronic NSAIDs and other nephrotoxins, maintaining a healthy weight, not smoking, and a Mediterranean diet with adequate hydration. In people with established CKD, nutritional decisions are individualized by nephrology, and supplements require special caution. The myths that "protein damages the kidneys" do not apply to people with normal kidney function.