Does Baking Soda Cure Cancer?

The story is compact, which is part of its power. Cancer cannot survive in an alkaline body. Modern food, sugar, and stress have made you acidic. Drink baking soda in water, raise your pH, and the cancer has nowhere left to live. Some versions add that cancer is really a fungus, and that bicarbonate simply washes it away.

Every load-bearing part of that is wrong. One small piece is true, and the sections below show you how to tell them apart.

pH measures acidity. Your body keeps its acid-base balance steady, and MedlinePlus says your kidneys and lungs work together to do it. Your lungs adjust it by changing how much carbon dioxide you breathe out. Your kidneys remove acid or base through your urine.

A glass of anything does not override that. You can change the pH of your urine. That does not show that your blood or tumor changed. The urine changed because your kidneys were clearing the excess.

Tumors are often described as acidic around the edges. Cancer cells frequently break down glucose fast and make lactate, which is acidic. NCI also reports that cancer cells can take lactate into their mitochondria and use it to make lipids they need for growth. That finding came from lab-grown cells, and researchers still need to learn how often it happens in real tumors.

The myth reverses cause and effect. Any acidity near a tumor is a result of what the tumor is doing. It is not a pre-existing condition of your body that invited cancer in. Tumor metabolism is a serious research field. It does not end with a spoon of baking soda.

Even granting everything above, the claim has no support. NCI says there is not one food or special diet that has been shown to control cancer. Its page on diets and supplements lists "alkaline diet" among the diets without proof of fighting cancer. NCI also warns that some of these products can change how your cancer treatment works.

Sodium bicarbonate is not a folk remedy that medicine has overlooked. MedlinePlus notes that doctors may give it by vein for some acid-balance problems, such as acidosis, and treat the cause of the problem. That is done by a care team watching blood tests. It is not a wellness ingredient.

Large amounts are not a safe cancer treatment. Treat any large dose as a poisoning risk. If someone has taken a large amount, or has vomiting, severe belly pain, confusion, seizures, or trouble breathing, call 911 right away. You can also call Poison Control at 1-800-222-1222 in the US. Do not wait for symptoms to pass.

Here is the part worth keeping.

Baking soda does belong in cancer care, just not as a cure. NCI's guidance on mouth and throat problems during treatment recommends rinsing your mouth through the day with a solution of warm water, baking soda, and salt. Cancer treatment can cause mouth sores and soreness, and NCI lists this rinse among the steps for looking after the mouth.

NCI adds that you should ask your nurse to write down the rinse recipe recommended for you, since proportions should suit your situation.

So if a relative tells you baking soda has a place in cancer treatment, they are not entirely wrong. They have the right substance and the wrong job.

It hands you a lever. Cancer takes away nearly every lever a person has, and this one costs a dollar and sits in the cupboard. No appointment, no referral, no permission.

It also supplies an explanation, which is its own comfort. "Your body got too acidic" answers the question that haunts people, which is why me. Real oncology often cannot answer that.

And a urine strip changing color feels like feedback. Almost nothing else in cancer gives you feedback that fast.

The larger harm is lost time. Every week spent waiting for pH to fix things is a week the cancer goes untreated. NCI describes alternative medicine as something used instead of standard treatment, such as a special diet used instead of cancer drugs prescribed by an oncologist.

Ask where the pH is being measured. Blood, urine, saliva, and the fluid inside a tumor are four different things, and these claims slide between them without saying so. Anyone offering a urine or saliva strip as proof has measured the wrong compartment.

Ask what regulates it. MedlinePlus says the kidneys and lungs maintain the body's acid-base balance.

Ask whether the substance is already a drug. Bicarbonate is, and then a drug label exists that describes the harms.

Then tell your team what you are taking, including baking soda. NCI advises talking with your doctor before using any such product.

• Diets, Supplements, and Cancer — National Cancer Institute
• Another Cancer Cell Energy Source — National Cancer Institute
• Mouth and Throat Problems — National Cancer Institute
• Acidosis — MedlinePlus
• Cancer Treatment: Complementary and Alternative Medicine — National Cancer Institute