Sauerkraut is high in sodium. A single cup of canned sauerkraut contains roughly 939 mg of sodium, nearly half the World Health Organization’s recommended daily limit of 2,000 mg for adults. Even a modest half-cup serving delivers around 470 mg, making sauerkraut one of the saltier items you’ll find in the condiment aisle.
How Much Sodium Per Serving
Most people eat sauerkraut as a topping or side dish, not by the cupful. A reasonable portion is about two to three tablespoons, which lands somewhere around 150 to 250 mg of sodium depending on the brand. That’s manageable on its own, but it adds up fast if you’re piling it on a hot dog that already contains 500+ mg of sodium in the sausage alone, plus another 200 or more in the bun.
The sodium range across brands varies more than you might expect. Standard commercial sauerkraut hovers around 460 to 470 mg per half cup. Some products marketed as lower-sodium options bring the count down significantly. Eden Organic’s sauerkraut, for example, lists 170 mg per two-tablespoon serving. Reading the nutrition label is worth the five seconds it takes, because two jars sitting next to each other on the shelf can differ by hundreds of milligrams per serving.
Why Sauerkraut Needs Salt
The sodium isn’t just for flavor. Salt is what makes sauerkraut possible. During fermentation, salt draws water out of shredded cabbage to create a brine, and that brine encourages beneficial lactic acid bacteria to grow while suppressing harmful microbes. Colorado State University Extension recommends using 2 to 2.5% salt by weight of the cabbage, which works out to about three tablespoons of salt per five pounds of shredded cabbage.
You can’t simply skip the salt and hope for the best. Without enough salt, spoilage bacteria and molds take over before the beneficial bacteria have a chance to lower the pH and preserve the cabbage. The salt is doing the heavy lifting in the early hours of fermentation, buying time for the good microbes to establish themselves.
More Salt Means Fewer Probiotics
Here’s something worth knowing if you eat sauerkraut partly for its probiotic benefits: higher salt concentrations actually reduce the population and activity of beneficial bacteria. Research published in the Journal of Food Engineering found that as salt levels increase, lactic acid bacteria grow more slowly, produce less lactic acid, and take longer to fully ferment the cabbage. At very high salt levels, an entire early phase of fermentation gets skipped because the bacteria responsible for it can’t tolerate that much salt.
This means the saltiest sauerkraut on the shelf may actually deliver fewer live beneficial bacteria than a moderately salted version. If gut health is part of why you’re eating sauerkraut, a product with lower sodium could be a better choice for two reasons at once.
How It Compares to Other Fermented Foods
Sauerkraut isn’t uniquely salty among fermented vegetables. Pickles, kimchi, and miso all rely on salt-driven fermentation and tend to be high in sodium as well. The American Medical Association groups all of these together as fermented foods that warrant checking the label for salt content.
- Dill pickles: roughly 300 to 500 mg per pickle, depending on size and brand
- Kimchi: about 500 to 700 mg per half cup, sometimes higher
- Miso paste: around 600 to 900 mg per tablespoon
- Sauerkraut: roughly 460 to 470 mg per half cup for standard varieties
Sauerkraut falls in the middle of the pack. It’s not the worst offender, but none of these are low-sodium foods by any standard.
Practical Ways to Reduce the Sodium
Rinsing sauerkraut under cold water before eating it can wash away a meaningful portion of the surface sodium. You’ll lose some tanginess and some of the beneficial bacteria along with it, but if sodium is your primary concern, rinsing is the simplest fix. A quick rinse and drain can cut sodium content by roughly 30 to 40%.
Making sauerkraut at home gives you direct control over the salt level. Staying at the lower end of the 2 to 2.5% range produces a perfectly safe ferment with noticeably less sodium per serving. You won’t be able to go much below 2% without risking spoilage, but even that small reduction adds up across the jar.
Choosing reduced-sodium commercial brands is another straightforward option. These products use less salt or sometimes substitute part of the sodium chloride with potassium chloride. They ferment properly and taste close to the original, just with a lighter salt profile. If you eat sauerkraut several times a week, switching brands could save you a few thousand milligrams of sodium over the course of a month.
Where Sauerkraut Fits in a Sodium Budget
The WHO recommends keeping total daily sodium under 2,000 mg. A two-tablespoon serving of standard sauerkraut uses up roughly 10 to 12% of that budget. That’s not trivial, but it’s not a dealbreaker either, especially if the rest of your meals that day aren’t loaded with processed food.
The real risk with sauerkraut isn’t the sauerkraut itself. It’s the context. A Reuben sandwich with sauerkraut, corned beef, Swiss cheese, and Russian dressing can easily top 1,500 mg of sodium in a single meal. The sauerkraut contributes maybe 200 to 300 mg of that total. If you’re watching sodium intake, the bigger wins come from looking at the full plate rather than singling out the sauerkraut.