Smartwater is not better than regular water for hydration. All types of drinking water, whether tap, filtered, or bottled with added electrolytes, hydrate the body equally well. The difference comes down to taste preference and what you’re willing to pay, not any measurable health advantage.
What’s Actually in Smartwater
Smartwater starts as vapor-distilled water. The distillation process heats water until it becomes steam, leaving behind minerals, metals, and other dissolved compounds. The steam then cools and condenses back into liquid, producing water that’s essentially a blank slate. After distillation, small amounts of electrolytes are added back in.
The electrolyte levels per liter are quite low: 20 mg of magnesium, 77 mg of sulfate, 10 mg of bicarbonate, 5 mg of potassium, and less than 1 mg each of sodium, calcium, chloride, and fluoride. To put those numbers in perspective, a single banana contains about 422 mg of potassium, roughly 84 times what’s in a liter of Smartwater. The electrolytes are added primarily for taste, giving the water a clean, slightly crisp flavor that many people prefer over plain distilled water, which can taste flat.
How Tap Water Compares
Regular municipal tap water actually contains a meaningful amount of minerals on its own. USDA research on U.S. drinking water found that two liters of tap water per day provides about 10% of the daily value for copper, 6% for calcium, 5% for magnesium, and 3% for sodium. Average tap water contains 20 to 30 mg per liter of calcium and around 10 mg per liter of magnesium, levels that epidemiological research has associated with health benefits.
Smartwater’s calcium content is less than 1 mg per liter, while its magnesium sits at 20 mg per liter. So tap water delivers comparable or greater mineral content depending on your local supply, and it does so without the distillation-and-readdition process. Well water and municipal water show no significant differences in overall mineral content, according to USDA analysis, so this comparison holds whether you’re on city water or a private well.
The Hydration Question
This is the core of what most people want to know: does Smartwater hydrate you better? It does not. Ohio State University’s health division reviewed the major categories of drinking water and concluded that all provide adequate hydration, with none being more hydrating than another. Your body absorbs water the same way regardless of whether it went through vapor distillation or came from a treatment plant. The small amount of electrolytes in Smartwater is far too low to meaningfully affect fluid absorption the way a sports drink might after intense exercise.
What About Smartwater Alkaline
Smartwater also sells an alkaline variant with a higher pH. Alkaline water has a pH above 7 (neutral), and marketing often implies this offers health benefits. The Mayo Clinic’s position is straightforward: for most people, alkaline water is not better than plain water. Claims that it can prevent serious diseases like cancer lack sufficient evidence. There are preliminary suggestions that alkaline water combined with a plant-based diet may help with acid reflux, and some studies hint at a possible role in slowing bone loss, but neither claim has enough research behind it to be considered reliable. You’re not getting a proven health benefit from the higher pH.
The Cost Gap
The price difference is where the comparison gets stark. Smartwater typically retails for $2 to $4 per bottle, and airport or convenience store prices can push that to $7. Municipal tap water in the U.S. costs fractions of a cent per liter. Even accounting for a basic home water filter, the cost per liter stays well under a penny. Over a year, drinking the recommended amount of water entirely from Smartwater bottles would cost hundreds of dollars more than drinking the same volume from your tap.
If you live in an area with poor-tasting tap water, a simple carbon filter pitcher or faucet attachment can improve flavor and remove common contaminants like chlorine for a tiny fraction of the bottled water price. If your concern is lead or other specific contaminants, a certified filter designed for those substances is a more effective and cheaper long-term solution than any bottled water.
When Electrolyte Water Makes Sense
There are situations where electrolyte replenishment genuinely matters: prolonged exercise lasting more than an hour, heavy sweating in extreme heat, recovery from vomiting or diarrhea. In those cases, the electrolyte concentrations in Smartwater are too low to make a real difference. A proper oral rehydration solution or even a sports drink contains dramatically higher levels of sodium and potassium, the two electrolytes your body loses most during sweat and illness. Smartwater contains less than 1 mg of sodium per liter. A standard sports drink contains around 460 mg per liter.
For everyday hydration, regular water from any clean source does the job. Smartwater tastes different, and if you enjoy that taste enough to pay for it, that’s a valid personal choice. It just isn’t a health upgrade.