Overview
About Sodium bicarbonate
Sodium bicarbonate is the label name for the raising agent, additive E500 and dissolvable-tablet ingredient that turns up far more often than people realise: in self-raising flour, cakes and biscuits, effervescent painkillers and vitamin tablets, rehydration and antacid powders, some mineral waters, and in the tubs athletes use for bicarbonate loading. As a single inorganic salt it has no plant chemistry at all, so it is clean for gluten, lactose, dairy protein, caffeine, nightshades and every FODMAP group we track. The trigger worth tracking is not a food chemical, it is the sodium and the dose. One teaspoon carries roughly 1,260 mg of sodium, and the classic complaint at supplement-sized doses is gut upset within the hour.
Sensitivities
How Sodium bicarbonate scores
Watch for
What trips people up
- Sodium is the real story. A single teaspoon of sodium bicarbonate supplies around 1,260 mg of sodium, which is most of a full day on a 1,500 mg target and roughly half a day at 2,300 mg. If you track blood pressure, fluid retention or puffiness, this belongs in the log as a sodium event
- Dose-related gut upset is the best documented effect. Bicarbonate loading protocols used before exercise are typically 0.2 to 0.3 g per kg of body mass, and bloating, cramping, nausea and diarrhoea within 60 to 90 minutes are common enough that athletes split the dose or take it with a meal
- It hides under several names. Bicarbonate of soda, sodium hydrogen carbonate and E500 are the same compound, and self-raising flour, soda bread, effervescent and soluble medicines all carry it. Soluble and dispersible tablets in particular can carry a surprising sodium load per dose
- Our sheet grades sodium bicarbonate borderline for salicylate and oxalate. Read those as caution flags on a processed additive rather than as content: a purified inorganic salt contains no plant secondary compounds, so it cannot supply salicylate, oxalate, lectins or fermentable carbohydrate
- Raising the pH of a food changes it. Bicarbonate in cooking water softens legumes and vegetables and deepens browning in baked goods, but it also degrades some heat-sensitive vitamins such as thiamine and vitamin C, which is a nutrition note rather than a trigger one
Diet fit
Where it fits
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FAQ
Common questions about Sodium bicarbonate
How much sodium is in sodium bicarbonate?
Sodium makes up a little over a quarter of the compound by weight, so a level teaspoon (about 4.6 g) delivers roughly 1,260 mg of sodium. That is more than a whole day of sodium on a 1,500 mg DASH target and about half a day at the general 2,300 mg limit. Recipe amounts spread across a whole loaf or tray are small per serving, but a dissolved dose taken straight is not.
Why does sodium bicarbonate give you bloating or diarrhoea?
Two reasons that stack. It reacts with stomach acid to release carbon dioxide gas, which causes belching and pressure, and any bicarbonate that reaches the intestine draws water in osmotically. This is why sports protocols of 0.2 to 0.3 g per kg body mass are notorious for gut symptoms, and why splitting the dose, taking it with food or using a slower delivery form reduces them.
Is sodium bicarbonate gluten free and low FODMAP?
Yes on both counts. It is a purified mineral salt with no wheat, barley or rye contact and no fermentable carbohydrate, so it carries no gluten, no lactose, no dairy protein and no fructan, polyol, fructose or GOS load. If a baked good made with it bothers you, the flour, the sugar or the fat is the thing to test, not the raising agent.
Is sodium bicarbonate the same thing as baking soda?
Chemically yes. Sodium bicarbonate is the chemical name, baking soda and bicarbonate of soda are the kitchen names, and E500 is the additive number on an ingredients panel. The practical difference is context rather than composition: you meet baking soda by the spoon in a recipe and sodium bicarbonate as a listed additive or as a measured dose in a supplement or medicine, and the dose per exposure is what changes how it feels.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.