Sole water (pronounced “so-lay”) is a saturated salt solution made by dissolving Himalayan pink salt or other unrefined salt in water until the water can’t absorb any more. Proponents drink a small amount each morning, claiming it improves hydration, digestion, and energy levels. While the basic chemistry is straightforward, the health claims far outpace the available evidence.
How Sole Water Is Made
The preparation is simple. You fill a glass jar about one-quarter full with Himalayan pink salt or another unrefined salt, then cover it with water and let it sit overnight. If all the salt dissolves, you add more. Once some salt remains undissolved at the bottom, the solution is fully saturated, meaning the water is holding the maximum amount of salt it physically can. At room temperature, that saturation point is roughly 36 grams of salt per 100 grams of water, creating a solution that’s about 26% salt by weight.
To drink it, you take one teaspoon of this concentrated brine and stir it into an 8-ounce glass of room-temperature water. Most sole water advocates recommend drinking this first thing in the morning on an empty stomach. The jar of saturated solution sits on your counter indefinitely, since the high salt concentration prevents bacterial growth. You simply top it off with water or salt as needed.
What’s Actually in It
Himalayan pink salt is about 98% sodium chloride, the same compound in regular table salt. The remaining 2% is where the marketing gets interesting. A laboratory analysis of 31 pink salt samples published in the journal Foods found trace amounts of calcium, magnesium, potassium, iron, and sulfur, along with smaller quantities of manganese, copper, zinc, and silicon. The pink color itself comes from iron oxide.
Here’s the practical reality: those trace minerals exist in extremely small concentrations relative to the sodium. The salt is roughly 39% sodium by weight, while calcium and magnesium each make up less than 0.3%, and potassium about 0.2%. Iron, the mineral most often highlighted in pink salt marketing, averages around 64 parts per million. In a single teaspoon of diluted sole water, you’d get a negligible fraction of your daily needs for any of these minerals. You’d get far more potassium from a single bite of banana and more iron from a few spinach leaves.
The analysis also detected non-nutritive elements including aluminum, lead, and barium, though arsenic and cadmium were undetectable. At the tiny doses involved in sole water, these trace contaminants aren’t a meaningful safety concern. But their presence is a reminder that “natural” and “pure” aren’t the same thing.
The Claims vs. the Evidence
Sole water is promoted for a long list of benefits: better hydration, improved sleep, more stable energy, clearer skin, stronger bones, and improved digestion. These claims are rooted in the idea that the trace minerals in unrefined salt offer something regular water or table salt cannot. No clinical trials have tested sole water specifically, and none of these benefits have been demonstrated in peer-reviewed research.
The hydration claim has a kernel of truth behind it, but it’s being stretched far beyond what the science supports. Sodium does play a central role in hydration. It’s the primary electrolyte in the fluid outside your cells, and it helps regulate how water moves in and out of cells through a mechanism called the sodium-potassium pump. This is why oral rehydration solutions used for dehydration contain sodium. But these solutions are carefully formulated with specific ratios of sodium, glucose, and potassium. A teaspoon of salt brine in a glass of water is not the same thing, and most people eating a typical diet already get more than enough sodium to maintain fluid balance.
The digestion claims are even thinner. Your body does regulate how quickly salt solutions move through your stomach, with more concentrated solutions emptying more slowly. Drinking a highly concentrated salt solution (like a saltwater flush) can have a laxative effect by drawing water into the intestines. But there’s no evidence that the diluted amount of salt in a glass of sole water meaningfully stimulates digestion or improves gut health in any measurable way.
Sodium Intake and Safety
The World Health Organization recommends adults consume less than 2,000 milligrams of sodium per day, equivalent to about 5 grams (just under a teaspoon) of salt. Most people in Western countries already exceed this, averaging 3,000 to 5,000 milligrams daily.
One teaspoon of saturated sole water contains a meaningful dose of sodium, though far less than a teaspoon of straight salt since the brine is diluted in water. Still, adding it to a diet that’s already sodium-heavy pushes you further past recommended limits. For most healthy adults, a single daily glass of sole water isn’t likely to cause immediate problems. But over time, excess sodium intake raises blood pressure, increases the risk of heart disease and stroke, and puts strain on the kidneys.
People with high blood pressure, kidney disease, or heart failure are at the highest risk from added sodium. If you fall into any of these categories, sole water is a poor choice. Even for healthy individuals, deliberately adding sodium to your morning routine without a clear benefit doesn’t make much nutritional sense when the average diet already provides more than enough.
Why People Feel a Difference
Some sole water drinkers report genuinely feeling better. This isn’t necessarily imaginary, but it doesn’t require a mineral-rich explanation. If you’re mildly dehydrated (common first thing in the morning), drinking a full glass of water with a small amount of sodium will help your body absorb that water slightly more efficiently than plain water alone. The ritual of drinking water immediately upon waking, before coffee or food, is itself a hydration improvement for many people who otherwise wouldn’t drink anything until mid-morning.
The placebo effect also plays a significant role in subjective experiences like energy and sleep quality. When you adopt a wellness practice you believe in, you tend to notice improvements and attribute them to the new habit. Without controlled studies comparing sole water to plain water or a standard electrolyte drink, it’s impossible to separate the effect of the salt solution from the effect of simply drinking water in the morning.
Simpler Alternatives
If your goal is better hydration, a glass of plain water in the morning accomplishes most of what sole water promises. If you’re physically active or sweating heavily, an electrolyte drink or even a pinch of salt in your water provides sodium without the ritual of maintaining a saturated brine jar. If you’re drawn to the trace minerals in Himalayan salt, eating a varied diet with fruits, vegetables, nuts, and seeds will deliver those same minerals in quantities that actually register nutritionally, without the extra sodium.
Sole water isn’t dangerous for most people in the amounts typically recommended. But it’s a complicated way to get a simple thing (water and a little salt) while layering on health claims that no study has validated. The minerals that make it sound special are present in amounts too small to matter, and the one ingredient present in large amounts, sodium, is something most people should be cutting back on.