You Can’t Change Your Blood pH by Eating an Alkaline Diet
However fruit and vegetables are still good for you
The Alkaline Myth — In Plain Language
Can food alkalize your blood?
No. Blood pH is locked between 7.35–7.45 by breathing and kidneys. If it drifted outside that range, you’d be unconscious.
Why do people say foods are “alkaline” or “acidic”?
Because breakdown products show up in urine. That’s the waste stream — not the blood.
The irony.
Health depends on preserving acid, not removing it. The body does this by holding on to carbon dioxide.
The Bohr effect.
CO₂ and acidity help hemoglobin release oxygen. Lose CO₂ (by over-breathing), and oxygen stays stuck in the blood instead of reaching cells.
The truth.
Vegetables are good because they’re vegetables. But it’s your breathing, not your diet, that controls blood pH and oxygen delivery.Let’s keep this simple. You cannot alkalize your blood by changing your diet.
Blood pH is held within a razor-thin range — 7.35 to 7.45 — by breathing and by the kidneys. If it drifted much outside that, you wouldn’t be browsing diet tips, you’d be in an ICU.
Yes, vegetables are good for you. Yes, protein produces more acid byproducts. But the only place you’ll see that change is in your urine, not your blood.
And here’s the irony: your body’s real job is to preserve acid, not get rid of it. It does this bu holding onto carbon dioxide. Over-breathing wastes CO2 and pushes you towars
So eat vegetables because they’re vegetables. Eat less processed food because it’s processed food. But don’t kid yourself that kale is “alkalizing” your bloodstream.
Catherine Broué works with the body as a whole system, focusing on breath and the nervous system. After two decades in ICU and dialysis, she turned to the deeper question of real health, guided by mentors and the insights of Christian Bohr and Konstantin Buteyko. Her work centres on the body’s true regulators — breath and the central nervous system — and the return to parasympathetic dominance.