Keto made easy

Does Keto Cause Kidney Stones?

Quick answer: Some people report kidney stones on long-term keto, and KetoDick lists it among the side effects worth taking seriously, depending on your medical concerns and genetics (video uXzscHudgt0). The evidence pages behind this site don't include a study on keto and kidney stones, so we can't give you a rate. What we can say: hydrate properly, don't dismiss symptoms, and if you've had stones or have kidney disease, talk to your doctor before you start.

On this page

What he actually says about kidney stones

He brings it up in an early video, in a list of concerns some people raise about long-term keto: heart disease, liver function, and kidney stones. Whether those are concerns for you, he says, depends on your medical history and genetic background (video uXzscHudgt0).

His framing is that keto is an intervention, and interventions have side effects (video uXzscHudgt0). So the right response to "people say it causes kidney stones" isn't "that's a myth" or "keto is dangerous." It's: get it checked, and weigh it against why you're doing keto in the first place. He says the same about blood lipids, which he tells people to get tested (video cTGYIFOTPl8).

What we know and what we don't

Honest version:

Treat anyone online who gives you a confident percentage, either way, with suspicion and ask for their source. That's his rule too: whoever makes a claim should share their sources (video UygKGoP_BtA).

Protein and your kidneys

A separate worry often gets mixed in: "keto is high protein, and protein hurts your kidneys." Two things are worth untangling.

First, keto done his way isn't especially high protein. His starting targets are about 80 g a day for women and 100 g for men, more if you're tall or training hard (video UygKGoP_BtA). He describes an upper limit, saying an adult male liver can process something like 220 g of protein a day before the liver and kidneys hit limits (video cTGYIFOTPl8). That 220 figure is his; it isn't on the evidence page.

Second, the evidence on protein and kidney function in healthy adults is reassuring, while flagging people who already have kidney disease. Details are in the research section. See protein and kidneys.

Hydration: the part you control

The thing you can actually do something about is water. In his basics video, his test is urine color: pale yellow is right, clear is too much, dark is too little (video UygKGoP_BtA).

Keto changes your fluid balance early. You lose stored glycogen and the water bound to it, and you hold less sodium, so you can run a little dry without noticing. So what you do:

  1. Check your urine color through the day, not just in the morning.
  2. Salt your food and drink broth. He suggests a cup of salted broth or bouillon twice a day (video UygKGoP_BtA). Water without electrolytes can leave you peeing it straight out.
  3. Don't overcorrect. Clear urine all day means you're overdoing it. See hydration.
  4. Check before potassium supplements. He says to talk to your doctor before taking potassium or magnesium supplements (videos 9r2Y74AnjUQ, lbRPlGZ3Rvw). Light salt in food amounts is different from pills.

What the research says

What the evidence pages do cover is protein, potassium and kidney function, not stones:

None of these measured kidney stones. They address the "protein wrecks your kidneys" worry, not the stone question directly.

KetoDick's take

He doesn't wave it away and he doesn't hype it. His consistent pattern is: keto is a tool with possible side effects, and the right move is to get checked, not to ask a forum (videos uXzscHudgt0, 1m1hPgaRIg4). He also specifically names any kidney issue as a reason to involve your doctor, for example if your ketone strips run very dark (video GojQvo_2GS0).

When to involve your doctor

Before you start, if you've ever had a kidney stone, have kidney disease or reduced kidney function, or take medication that affects fluids or potassium (some blood pressure drugs and diuretics do). During keto, if you get flank or back pain, blood in your urine, or pain when urinating, see a doctor promptly; that isn't a "wait and see" symptom. And ask for kidney function in your baseline labs if you plan to stay low-carb for months.

Key takeaways