What baking soda in water actually does
Drinking baking soda mixed with water creates a basic (alkaline) solution that temporarily raises the pH of your stomach and bloodstream. When you drink it, the baking soda reacts with stomach acid, producing carbon dioxide gas — which is why you feel fizzing or bloating. Your body then works to restore its normal pH balance, a process that takes a few hours.
People drink baking soda for two main reasons: to settle an upset stomach in the short term, or based on the idea that it can change how acidic their body is overall. The first actually happens. The second is more complicated, because your body has powerful systems that keep your blood pH stable no matter what you drink — your kidneys and lungs handle that job, not your beverages.
Key Takeaways
- Baking soda can reduce stomach acid temporarily and may ease heartburn or indigestion within 30 minutes, but the effect is short-lived.
- Drinking baking soda does not permanently change how acidic your body is, because your kidneys and lungs maintain blood pH automatically.
- Regular baking soda use can cause side effects including nausea, vomiting, muscle weakness, and in rare cases, serious electrolyte imbalances.
- People with high blood pressure, kidney disease, or those taking certain medications should not drink baking soda without talking to their doctor first.
- For heartburn or indigestion, over-the-counter antacids designed for that purpose are safer and more predictable than baking soda.
How baking soda affects your stomach
When baking soda reaches your stomach, it neutralizes hydrochloric acid — the acid your stomach uses to break down food. This neutralization produces water, salt, and carbon dioxide gas. The gas is what causes the fizzing sensation and can lead to bloating or burping.
This acid-neutralizing effect can bring relief from heartburn or indigestion within 30 minutes to an hour. However, the relief is temporary. Once the baking soda is absorbed and your body restores its normal acid levels, the symptoms often return. For this reason, baking soda works best as an occasional remedy for mild, short-term discomfort — not as a regular treatment.
Why baking soda does not change your overall body acidity
A common claim is that baking soda can make your body "less acidic" or more alkaline overall. This misunderstands how your body maintains pH. Your blood pH is kept between 7.35 and 7.45 by your kidneys (which filter acid through urine) and your lungs (which exhale carbon dioxide, a mild acid). These systems are so effective that drinking baking soda has almost no effect on your blood pH.
Your stomach pH does drop temporarily when you drink baking soda, but that is a local effect in one organ. The idea that this creates a lasting "alkaline state" in your body is not supported by how human physiology works. If your blood pH actually rose significantly, you would need emergency medical care — it would be a serious condition called alkalosis.
Common side effects and who should avoid it
Occasional small doses of baking soda — a quarter teaspoon in water — are generally tolerated. But regular use or larger amounts can cause nausea, vomiting, muscle weakness, fatigue, and headaches. Some people experience constipation or diarrhea. The gas production can also cause significant bloating and abdominal discomfort.
Certain groups should not drink baking soda without medical guidance. This includes people with high blood pressure (baking soda contains sodium), kidney disease, heart disease, or those taking medications like diuretics, corticosteroids, or certain blood pressure drugs. Pregnant and breastfeeding people should check with their doctor first. If you have any chronic health condition, it is worth asking your doctor whether baking soda is safe for you.
Baking soda compared to other heartburn options
Over-the-counter antacids like calcium carbonate (Tums) or magnesium hydroxide (Milk of Magnesia) work similarly to baking soda — they neutralize stomach acid — but they are formulated and tested specifically for that purpose. They come in measured doses, so you know exactly how much you are taking. Antacids also tend to cause fewer side effects than baking soda when used as directed.
If heartburn is frequent or severe, H2 blockers (like famotidine) or proton pump inhibitors (like omeprazole) reduce acid production rather than just neutralizing it, and they last longer. These are available over the counter and are designed for regular use. A pharmacist can help you choose which option fits your situation.
What the research actually shows
Studies on baking soda for heartburn confirm it works in the short term — it does neutralize stomach acid. However, research on broader health claims (that it improves athletic performance, reduces inflammation, or changes body pH) is limited or does not support these ideas. Most claims about baking soda as a wellness drink come from anecdotal reports, not clinical evidence.
The evidence is clearest for one narrow use: occasional relief of mild indigestion or heartburn. Beyond that, the research either does not exist or does not show a benefit. If you are considering baking soda for any other reason — athletic recovery, general wellness, or chronic health issues — there is no strong scientific basis for that use.
How to use baking soda safely if you choose to
If you want to try baking soda for occasional heartburn, the standard dose is one-quarter to one-half teaspoon dissolved in a glass of water. Drink it slowly. Do not use it more than once a day, and do not use it for more than two weeks without talking to a doctor. If you need heartburn relief more often than that, a different approach is probably better.
Always mix baking soda with water — do not take it dry. Watch for side effects like nausea, vomiting, or unusual fatigue. If you experience muscle weakness, confusion, or severe bloating, stop using it and contact a doctor. And before you start, especially if you take medications or have any health condition, check with your doctor or pharmacist to make sure it is safe for you.
Frequently Asked Questions
Can I drink baking soda every day?
Regular daily use is not recommended. Frequent baking soda consumption can lead to nausea, vomiting, muscle weakness, and electrolyte imbalances. If you need heartburn relief daily, talk to a doctor about safer options like antacids or acid-reducing medications designed for regular use.
Does baking soda help with caffeine jitters or stomach upset from coffee?
Baking soda can temporarily reduce stomach acid, which might ease coffee-related indigestion. However, if coffee regularly upsets your stomach, reducing your intake or switching to lower-acid coffee is more effective than treating the symptom with baking soda each time.
Is baking soda water the same as alkaline water?
Baking soda water is alkaline, but alkaline water sold as a wellness product is different — it is usually ionized or has minerals added. Neither type permanently changes your body's pH. Both are marketed for health benefits that are not well supported by research.
What happens if I drink too much baking soda?
Large amounts can cause serious side effects including severe nausea, vomiting, muscle weakness, confusion, and dangerous electrolyte imbalances. In rare cases, this can lead to a condition called metabolic alkalosis, which requires medical treatment. Stick to small, measured doses and stop if you feel unwell.
Can I use baking soda instead of antacids?
Baking soda works similarly to some antacids, but over-the-counter antacids are formulated and tested for safety and effectiveness. They come in measured doses and are less likely to cause side effects. For occasional use they are a better choice than baking soda.