Eating a lot of protein might put extra strain on your kidneys, which could be harmful over time.
Evidence from Studies
Supporting (5)
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The study looked at people eating a lot of protein and found it made their kidneys work too hard and get worse faster, which matches the idea that too much protein stresses the kidneys.
Dietary Protein Intake and Single-Nephron Glomerular Filtration Rate
The study shows that eating more protein makes your kidneys work harder, which supports the idea that too much protein can stress your kidneys.
The study shows that eating a lot of protein (like casein) can stress rat kidneys by making them more acidic and reducing their function, which supports the idea that high protein might be bad for kidneys.
Low‐protein diet for chronic kidney disease: Evidence, controversies, and practical guidelines
The study looks at how eating too much protein can stress the kidneys, especially in people who already have kidney problems, which supports the idea that high protein intake is bad for kidney health.
The study looks at high protein diets and finds they can stress the kidneys by increasing pressure and filtration, which matches the claim that too much protein might harm kidney health.
Contradicting (2)
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Markers of Renal Function are Unchanged in Obese Older Adults Consuming a Higher Protein, Hypocaloric Diet for 6 Months
The study gave older adults more protein while they were losing weight and found no harm to their kidneys, which goes against the idea that high protein diets stress kidneys.
Controversies surrounding high-protein diet intake: satiating effect and kidney and bone health.
The study says high protein isn't really bad for healthy kidneys, which goes against the idea that it always causes stress.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.