The report reviews the evidence behind current sodium and potassium intake recommendations and concludes that the standard focus on sodium reduction alone is too narrow. Average sodium intake still exceeds recommendations worldwide, while potassium intake sits "far below optimal levels in both developed and developing nations." Because potassium can blunt the blood-pressure effect of sodium — and can even substitute for some sodium in salt — the authors argue for equal emphasis on getting more potassium. The message is about how the two nutrients work together, not in isolation.
For a stone patient, the relevance is direct. High sodium raises urinary calcium — a primary stone ingredient — so the sodium line matters for kidneys as much as for blood pressure. And potassium, particularly in the form of potassium citrate, is one of the classic tools for preventing calcium stones. The dietary version of the report's advice — more potassium from food, less sodium from the salt shaker and the package — overlaps almost completely with the stone diet's sodium and calcium levers.
Here is the measured complication: several foods famous for potassium are also famous for oxalate. Spinach, beets, and Swiss chard are potassium-rich and high-oxalate; bananas, potatoes, oranges, and cantaloupe are potassium-rich and low-oxalate. The table below separates the potassium food list by its oxalate column, which is the part most dietary advice on potassium omits.
| Food | Oxalate (mg) | Serving | Rating |
|---|---|---|---|
| Bananas | 6 | 1 medium | Safe |
| Potatoes, boiled | 7 | 1 medium | Safe |
| Oranges | 4 | 1 medium | Safe |
| Cantaloupe | 2 | 1 cup | Safe |
| Milk, cow's | 0 | 1 cup | Safe |
| Yogurt, plain | 0 | 1 cup | Safe |
| Sweet potatoes | 20 | 1/2 cup | Safe |
| Spinach, boiled | 75 | 1/2 cup | Avoid |
| Beets, boiled | 71 | 1/2 cup | Avoid |
The stone-safe way to raise potassium follows the same structure as everything else on this site: choose the low-oxalate members of the potassium list and portion the rest. Bananas, potatoes, oranges, melons, milk, and yogurt deliver potassium at the safe end of the oxalate table. The dark leafy greens and beets — the vegetables most dietary potassium advice highlights — are the ones that need the measured eye, and the classic solution is dairy pairing: the calcium in the same meal binds the oxalate they carry. A potato with yogurt, or an orange with milk, is the potassium plan and the calcium plan in one plate.
There is also a caution specific to kidneys that the report itself notes: potassium supplementation is not for everyone. People with advanced kidney disease or high potassium levels should not add potassium salts or supplements without a clinician's direction. For most stone patients, food potassium — the low-oxalate list above — is the safe route, and it is the route that matches both the blood-pressure report and the stone diet.
The report's framing — sodium and potassium as one system — is the same framing the stone diet has used all along, seen from a different organ. Lower sodium reduces urinary calcium. Higher potassium, especially with citrate, supports the urine chemistry that resists stones. Both levers come from the same plate: less processed food, more produce and dairy, and the measured exceptions handled by portion and pairing. The patient who follows the report's advice is quietly following the stone diet too.
It is high in potassium — and high in oxalate: boiled spinach measures about 75 mg per half-cup, in the avoid range. Bananas, potatoes, oranges, melons, milk, and yogurt deliver potassium at the safe end of the oxalate table, which makes them the better daily potassium sources for stone patients.
Potassium citrate is a prescribed treatment for some stone types — that is a clinical decision, not a supplement decision. Do not add potassium supplements or potassium salt substitutes without a clinician's direction, especially with kidney disease or blood-pressure medications. Food potassium, chosen from the low-oxalate list, is the safe daily route.
Yes. Excess sodium makes the kidneys excrete more calcium into the urine, and urinary calcium is a primary stone ingredient. The sodium line on a label is a calcium-excretion line in disguise — the same lever the July blood-pressure report says to pair with potassium.
The report's review includes the practical question of salt substitutes — replacing some of the sodium chloride in salt with potassium chloride. The evidence the report cites is significant: large trials using potassium-enriched salt substitutes have shown meaningful reductions in blood pressure and cardiovascular events in high-risk populations. For a stone patient, the substitution question needs the kidney lens: potassium chloride salt is not for everyone, and people with advanced kidney disease or high potassium levels — or those on certain blood-pressure medications — should not adopt it without a clinician's direction. For most stone patients, the safer route to the same goal is food potassium from the low-oxalate list and less sodium at the source: the processed foods that carry the sodium are the ones to portion, and the potassium-rich produce and dairy are the ones to add.
The measured version of the report's advice for a stone patient is therefore not a salt swap but a plate swap: the processed, salty items move down the priority list, and the banana, potato, orange, melon, milk, and yogurt move up. The two levers — less sodium, more food potassium — arrive on the same plate, and the oxalate column is checked by the same plate. That is the whole report, translated into the stone diet's language.
See how oxalate values are measured and verified on our data methodology page.