Baking Soda & Sodium: What to Know Before You Try It
Setting aside the weight-loss claims, there is a more practical question the viral posts skip entirely: baking soda is mostly sodium, and taking it daily is not risk-free.
Whatever you make of the trend, sodium bicarbonate is not an inert ingredient. It is a salt, and the amount in even a modest daily dose is substantial. The viral recipes almost never mention this, which is a problem, because the sodium load is the part most likely to matter to your health. Here is what the science says about taking it regularly.
How much sodium is in a spoonful
A single teaspoon of baking soda contains roughly 1,259 milligrams of sodium. For context, major health bodies including the American Heart Association recommend most adults stay well under 2,300 milligrams of sodium per day, and ideally closer to 1,500 milligrams. A single teaspoon of baking soda can therefore approach or exceed a full day's recommended sodium on its own — before you have eaten anything. Adding that to a normal diet can push daily sodium intake well past recommended limits.
The main risks
Two concerns stand out. The first is blood pressure: for people who are sodium-sensitive, a large added sodium load can raise blood pressure, and elevated blood pressure is a well-established cardiovascular risk factor. The second is metabolic alkalosis — a disturbance of the body's acid-base balance that can occur when too much bicarbonate is consumed. Documented case reports describe people who developed serious complications, including in rare cases stomach rupture from the gas produced, after taking large amounts of baking soda. These are not everyday events, but they illustrate that "it's just a kitchen ingredient" is a false reassurance.
Drug interactions and who should avoid it
Sodium bicarbonate can interfere with how the body absorbs and clears certain medications, and by changing stomach acidity it may affect some drugs' effectiveness. Because of the sodium content and the effect on fluid balance, several groups should be especially cautious or avoid it unless a doctor advises otherwise: people with high blood pressure, those with kidney disease, anyone on a sodium-restricted diet, people who are pregnant, and anyone taking prescription medication. The U.S. Food and Drug Administration lists sodium bicarbonate as an antacid with specific dosing warnings — including not to use the maximum dose for more than two weeks — which underscores that it is a substance with real limits, not a daily wellness drink.