Salt Substitutes (Potassium Chloride): What the Sources Say and Safety
Salt substitutes swap some sodium for potassium chloride. Trials show lower blood pressure, but kidney disease and some blood pressure medicines can make them risky.
Content last updated . This page has not been medically reviewed.
What is Salt Substitutes (Potassium Chloride) good for?
What the body uses it for, and how strong the evidence is. A normal job in the body is not proof that extra supplements add benefit; each card says which.
Swapping some table salt for potassium-enriched salt: blood pressure
Clinically supportedThe Cochrane review of 26 trials found low-sodium salt substitutes probably lower blood pressure in adults and probably raise blood potassium slightly.
Supplements: Supported for adults without high-potassium risk; trials were mostly in China and Taiwan.
Stroke, heart events and death (SSaSS trial)
Clinically supportedIn about 21,000 people in rural China with prior stroke or age 60+ with high blood pressure, a potassium-enriched salt led to less stroke, fewer major heart and blood vessel events and fewer deaths. A 2024 review says the evidence is dominated by this one trial.
Supplements: Promising but limited outside the studied group.
WHO suggests lower-sodium salt substitutes containing potassium
Clinically supportedWHO says that if people use table salt, it suggests lower-sodium salt substitutes that contain potassium. Its adult target is under 2,000 mg sodium (under 5 g salt) a day. The page we read does not say who should avoid them.
Supplements: Information only.
Children and pregnancy
Not enough evidenceThe Cochrane review found no studies in pregnant women and very uncertain evidence in children.
Supplements: No good evidence either way.
Sellers' claims that natural or mineral salt substitutes are better
Not enough evidenceProper evidence not found in the sources we read for brand or mineral-salt claims; claim made by sellers.
Supplements: No good evidence found.
Connected topics
Open a group to see how each topic connects and how strong the evidence is.
Health goals (2)
- Blood Pressure SupportClinically supported
Trials show potassium-enriched salt probably lowers blood pressure in adults without high-potassium risk.
- Heart HealthClinically supported
One large trial found less stroke and fewer deaths in a studied group; the wider evidence is uncertain.
Body systems (2)
- Kidney & UrinaryDocumented risk
Kidney disease raises the risk of high potassium from salt substitutes.
- Cardiovascular SystemClinically supported
Blood pressure and stroke results from trials, mostly in China and Taiwan.
Body parts (1)
- KidneysDocumented risk
Kidneys clear potassium, so reduced function lets it build up.
Functional actions (1)
- Cardiovascular SupportClinically supported
Replacing some sodium with potassium lowers blood pressure in trials.
Root causes (1)
- Medication Side EffectsDocumented risk
ACE inhibitors, ARBs and spironolactone can raise potassium, adding to a salt substitute.
Conditions & symptoms (4)
- Essential HypertensionClinically supported
Trials show probable lowering of blood pressure in adults; SSaSS enrolled people with high blood pressure.
- HyperkalemiaDocumented risk
MedlinePlus lists salt substitutes as a cause of high potassium.
- Kidney Failure, ChronicDocumented risk
NIDDK advises avoiding salt substitutes high in potassium with chronic kidney disease.
- StrokeClinically supported
Less stroke in one large trial in a studied group; wider evidence uncertain.
Documented risks and interactions (3)
- High potassium in kidney disease. MedlinePlus lists salt substitutes among causes of high potassium and says kidney problems can let potassium build up. NIDDK advises spices and herbs instead of salt substitutes for people with kidney disease. A hospital case report describes potassium of 7.5 mEq/L after a potassium-enriched salt in a man with chronic kidney disease.
- Blood pressure medicines that raise potassium. MedlinePlus names ACE inhibitors, ARBs and spironolactone as causes of high potassium. High potassium often has no symptoms but can cause chest pain, a slow or irregular pulse and sudden collapse.
- Potassium chloride hidden in packaged foods. NIDDK notes potassium chloride is sometimes used in place of salt in packaged foods, so people limiting potassium need to read ingredient lists.
Safety first: potassium chloride salt substitutes can push blood potassium too high in people with kidney disease or who take certain blood pressure medicines. MedlinePlus lists salt substitutes among causes of high potassium, and names kidney problems and ACE inhibitors, ARBs and spironolactone as other causes. [1] High potassium often has no symptoms, but it can cause chest pain, a slow or irregular pulse and sudden collapse. [1] Ask a doctor, kidney dietitian or pharmacist before using one if this could be you. Do not stop a prescribed medicine on your own.
For people without those risks, large trials suggest potassium-enriched salt can help blood pressure and stroke risk. This page keeps apart what sellers say, what trials found, and what the safety reports show. It is about the salt shaker, not potassium pills.
What salt substitutes are
A Cochrane review describes low-sodium salt substitutes as products where some sodium chloride is replaced, mostly by potassium chloride. [2] Potassium chloride (KCl) is a salt of potassium; products may be sold alone or blended with ordinary salt. "Salt substitute," "lite salt," "low-sodium salt" and "potassium-enriched salt" are not one fixed recipe, so the label matters. NIDDK notes that potassium chloride is also sometimes used in place of salt in packaged foods. [3] Ordinary table salt is sodium chloride.Claims and what the sources found
| Claim or use | What the best source found | Evidence label | Route, product and who was studied |
|---|---|---|---|
| Lowers blood pressure | The Cochrane review of 26 trials found these products probably lower blood pressure in adults and probably raise blood potassium slightly. [2] | Established for adults without high-potassium risk | Eaten as a replacement for table salt |
| Fewer strokes and deaths | The SSaSS trial, in about 21,000 people in rural China with prior stroke or age 60+ with high blood pressure, found less stroke, fewer major heart and blood vessel events and fewer deaths. [4] | Promising but limited (one large trial, one population) | Potassium-enriched salt in the home |
| Long-term results | A 2024 review of trials lasting 6+ months found salt substitutes may lower deaths, but said the evidence is dominated by one large trial and is uncertain for Western populations. [5] | Promising but limited | Adults, mostly in China and Taiwan |
| Safe for everyone | Not supported: the Cochrane review found a slight rise in blood potassium, and a case report describes a hospital patient with chronic kidney disease whose potassium reached 7.5 mEq/L after eating a potassium-enriched salt. [2][8] | Insufficient evidence for safety in kidney disease | Case report, one 88-year-old man |
| Safe in pregnancy or children | The Cochrane review found no studies in pregnant women and very uncertain evidence in children. [2] | Insufficient evidence | |
| Tastes the same as salt | Proper evidence not found in the sources we read. | Not assessed | |
| "Natural" or "mineral" salt substitutes are better | Proper evidence not found in the sources we read; claim made by sellers. | Insufficient evidence |
Limits: the biggest trial was in one setting, mostly older adults, and later reviews say it dominates the evidence. [4][5] Numbers from China do not automatically carry over to other diets or to people with kidney disease.
Safety by group
- Kidney disease: MedlinePlus says long-term kidney disease can let potassium build up and calls for regular checks. [1] NIDDK says to use spices and herbs instead of salt substitutes, which can be high in potassium. [3] Two 2026 reviews say people with impaired kidney function need careful consideration, and that caution is needed in advanced kidney disease because of the risk of high potassium. [7][9]
- Medicines: MedlinePlus names ACE inhibitors, ARBs and spironolactone as causes of high potassium. [1] See medicine interactions and hyperkalemia.
- Swallowing a lot at once, or a child swallowing it: the sources we read do not describe this. If someone swallows a large amount, call Poison Help (US 1-800-222-1222) or your local emergency number. See poisoning: urgent help.
- Packaged food: potassium chloride can be on ingredient lists, so people told to limit potassium need to check labels. [3]
- Pregnancy and breastfeeding: no studies in pregnant women were found. [2]
- Babies and children: the evidence is very uncertain. [2] WHO's sodium advice does not cover exclusive breastfeeding or the first two years of complementary feeding. [6]
- Skin, breathing, mouth, water safety: not relevant to a food salt; the sources we read do not describe them.
How it is used and what to look for on a label
- Products are table-salt-like shakers, often a blend of sodium chloride and potassium chloride. The share of sodium chloride replaced ranged widely across trials. [2]
- Look for "potassium chloride" on the ingredient list of salt and of packaged food. [3]
- WHO says that if people use table salt, it suggests lower-sodium salt substitutes that contain potassium. Its adult target is under 2,000 mg sodium a day (under 5 g of salt). [6] Information only, not a recommendation for you.
- Not the same as sea, Himalayan or Celtic salt, which are mainly sodium chloride. See salt types compared.
Related pages
Frequently asked questions
Do salt substitutes lower blood pressure?
In a Cochrane review of 26 trials, they probably lowered blood pressure in adults. [2]
Do they prevent strokes?
In one big trial in rural China, stroke was less common with a potassium-enriched salt. [4] A later review calls the wider evidence uncertain because one trial dominates. [5]
Are they safe for people with kidney disease?
Not without medical advice. MedlinePlus and NIDDK warn about high potassium, and a case report describes a patient with kidney disease whose potassium rose to 7.5 mEq/L. [1][3][8]
Can I use one in pregnancy or for my child?
No pregnancy studies were found and the child evidence is very uncertain, so ask a clinician. [2]
Does it taste or cook like salt?
Proper evidence not found in the sources we read. Check the product label and ask a pharmacist about your own medicines.
References
- MedlinePlus (US National Library of Medicine). High potassium level. Review date 10/1/2025. Read 2026-10-24.
- Replacing salt with low-sodium salt substitutes (LSSS) for cardiovascular health in adults, children and pregnant women. Cochrane Database of Systematic Reviews 2022. PubMed 35944931. Read 2026-10-24 (abstract via Europe PMC).
- National Institute of Diabetes and Digestive and Kidney Diseases (US NIH). Healthy eating for adults with chronic kidney disease. Last reviewed January 2025. Read 2026-10-24.
- Effect of salt substitution on cardiovascular events and death (SSaSS). New England Journal of Medicine 2021. PubMed 34459569. Read 2026-10-24 (abstract via Europe PMC).
- Long-term effect of salt substitution for cardiovascular outcomes: a systematic review and meta-analysis. Annals of Internal Medicine 2024. PubMed 38588546. Read 2026-10-24 (abstract via Europe PMC).
- World Health Organization. Sodium reduction fact sheet. Page dated 11 May 2026. Read 2026-10-24.
- Sodium reduction and salt substitutes: impact on blood pressure and recurrent stroke. Current Opinion in Cardiology 2026. PubMed 42047235. Read 2026-10-24 (abstract via Europe PMC). It says patients with impaired kidney function need careful consideration.
- Hyperkalemia caused by potassium-enriched salt in a hospitalized patient. Cureus 2025. PubMed 40718189. Read 2026-10-24 (abstract via Europe PMC).
- Dietary salt intake and hypertension in chronic kidney disease. Electrolyte & Blood Pressure 2026. PubMed 42812504. Read 2026-10-24 (abstract via Europe PMC).