The Consistency Project The High-Protein Kidney Myth (And What the Science Actually Says)
Aug 6, 2025
Dive into the myths surrounding high-protein diets and kidney health. Discover the science that debunks the belief that protein harms renal function in healthy individuals. Learn safe intake levels and personalized recommendations for various populations. Explore the importance of kidney health tests and the risks of 'eating aspirationally'—focusing too much on elite diets while neglecting essential nutrients. This engaging discussion equips you with the knowledge to navigate protein consumption confidently.
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Kidney Protein Waste Process
- Kidneys filter blood roughly 30 times a day and dispose of waste as urine including protein breakdown products.
- Protein metabolism releases nitrogen in toxic ammonia form, converted to urea, then filtered by kidneys for excretion.
High Protein Safe for Kidneys Short-Term
- Human randomized controlled trials show high protein intake (≥0.7 g/lb) does not harm kidney function in healthy individuals.
- Long-term effects remain unclear as most studies are short-term (around 8 weeks).
Year-Long Study Supports Kidney Safety
- A year-long study with small sample size found no harmful kidney effects consuming 1.1 to 1.5 grams protein per pound.
- This supports safety of higher protein intake in healthy people but broader long-term data are limited.