"Eat less salt" is half the instruction. Two people can eat the exact same sodium and land in completely different places, depending on how much potassium sits next to it.
Public health messaging focuses on one mineral. Your body is balancing two.
Standard guidance caps sodium at 2,300mg/day — about one teaspoon of table salt, counting everything, not just what you add at the table.
But sodium doesn't act alone. Your kidneys are constantly balancing it against potassium — and most public health advice never mentions the second half of that equation.
Potassium helps your body excrete excess sodium and eases tension in blood vessel walls. A high-sodium, high-potassium diet behaves very differently than high-sodium, low-potassium — even at identical sodium levels.
Most people fall short of the 4,700mg/day potassium target, not because they eat too much sodium, but because they eat too little whole food.
Almost every salt on a shelf is 95%+ the same compound. The differences that matter aren't the ones on the marketing.
Himalayan pink and Celtic sea salt are marketed on their trace mineral content — magnesium, potassium, iron. The amounts are real, but nutritionally tiny. You'd need to eat an unreasonable, health-harming quantity of salt to get a meaningful dose of any of them from salt alone.
The differences that actually matter: whether it's iodized (most gourmet salts aren't, and iodine deficiency is a real, under-discussed issue), and grain size — a teaspoon of coarse salt delivers meaningfully less sodium than a teaspoon of fine table salt, which matters if you're tracking intake by the spoonful.
Bananas get the reputation. Several everyday foods actually outrank them.
The standard sodium cap assumes a normal-carb diet. Cut carbs hard — or fast — and the math changes.
Insulin normally signals your kidneys to hold onto sodium. When insulin drops — during carb restriction, fasting, or early keto adaptation — your kidneys excrete more sodium than usual, along with the water and potassium that go with it.
This is the actual mechanism behind "keto flu" — headache, fatigue, dizziness in the first week or two. It's usually electrolyte depletion, not carb withdrawal. → See the Carb & Fiber Codex for the low-carb side of this
Many low-carb and fasting protocols recommend meaningfully more sodium during adaptation than the standard 2,300mg guideline — often in the 3,000–5,000mg range, alongside adequate potassium and magnesium.
This isn't a license to ignore sodium if you eat a normal-carb diet — it's specifically for the metabolic state where insulin is low and the standard cap stops applying the way it usually does.
A simple way to front-load sodium early, especially useful during keto adaptation or a fasted morning.
Don't raise sodium without raising potassium too — the ratio is still the point, even in a low-carb context.
Rounds out the third major electrolyte — glycinate or citrate are reasonable everyday choices.
Bookmark this. Screenshot it. Pin it near the salt shaker.
| Item | Sodium / Potassium Role | Practical Note |
|---|---|---|
| Table Salt (Iodized) | Sodium + iodine | ~1 tsp = 2,300mg sodium, the full daily cap |
| Himalayan Pink Salt | Sodium, trace iron | Nutritionally similar to table salt, not iodized |
| Celtic / Grey Salt | Sodium, slightly higher trace minerals | Still not a meaningful mineral source |
| White Beans | Potassium: ~561mg/100g | Cooked, one of the highest common sources |
| Potato (with skin) | Potassium: ~544mg/100g | Higher than banana — keep the skin on |
| Avocado | Potassium: ~485mg/100g | Arrives with healthy fat, not starch |
| Banana | Potassium: ~358mg/100g | Good, but not actually the highest |
| Coconut Water | Potassium: ~250mg/100ml | Lower sodium — pair with added salt for real rehydration |
| Sports Drinks | Often sugar-heavy — see Sweetener Codex | Check the label before assuming it's a clean electrolyte source |
2,300mg sodium against 2,000mg potassium and 2,300mg sodium against 4,700mg potassium are not the same diet, even though the sodium is identical.
Pick your salt based on iodine content and how you're using it in the kitchen — not on a mineral claim that amounts to almost nothing per serving.
If you're deep in carb restriction or fasting, the standard 2,300mg cap likely doesn't apply to you the same way — salt your food more, not less.
Not everyone's blood pressure responds to sodium the same way — genetics play a real role here. If salt-sensitive hypertension runs in your family, the standard caps matter more for you specifically.