Liquid Death sparkling water is, nutritionally speaking, just water with bubbles. The unflavored version has zero calories, zero sugar, and nothing artificial. It hydrates you exactly as well as still water, and the tall can with skull branding is pure marketing. What’s inside is straightforward. The flavored varieties are a slightly different story, but even those are far closer to water than to soda.
What’s Actually in It
Liquid Death’s unflavored sparkling water contains two ingredients: mountain water and carbon dioxide. No sweeteners, no sodium worth mentioning, no additives. If you’re drinking this version, you’re drinking carbonated water in a can instead of a bottle.
The flavored sparkling waters add organic agave nectar for sweetness, bringing each 19.2-ounce can to about 10 calories and 2 grams of sugar. There are no artificial sweeteners and no caffeine. For context, a 12-ounce can of regular soda contains 39 to 46 grams of sugar, making Liquid Death’s flavored options roughly 90% lower in sugar per serving. Two grams of sugar is less than what you’d get from a single bite of an apple. If your main concern is sugar intake, the flavored versions are essentially negligible.
Hydration: Same as Still Water
Carbonation does not reduce how well your body absorbs water. A randomized trial that developed a “beverage hydration index” to compare different drinks found that sparkling water is just as hydrating as flat water. The CO2 bubbles escape as gas in your stomach and don’t interfere with fluid uptake. So whether you’re choosing Liquid Death or a glass of tap water, your body processes the hydration the same way.
One practical caveat: the carbonation can make you feel full faster, which might cause you to drink less during exercise or on hot days when you need higher fluid intake. If you’re using it as your primary workout drink, you may end up underhydrating simply because the bubbles make it harder to gulp down large volumes quickly.
Effects on Your Teeth
This is the one area where sparkling water differs meaningfully from still water. When CO2 dissolves in water, it forms a mild acid called carbonic acid. Lab testing of Liquid Death’s sparkling water found a pH of 5.23, compared to an average of 7 for regular bottled water. For reference, tooth enamel starts to weaken at a pH below about 5.5, so Liquid Death sits right near that threshold.
In practice, the risk is low for most people. Carbonic acid is far weaker than the acids in soda, juice, or even coffee. Your saliva naturally neutralizes it within minutes. But if you sip sparkling water continuously throughout the day, keeping your mouth in a mildly acidic state for hours, you could see some enamel wear over time. Drinking it with meals or in a reasonable timeframe rather than nursing a can all afternoon reduces that concern substantially. The flavored versions, which contain a small amount of sugar, carry marginally more risk since mouth bacteria feed on sugar to produce their own acid.
Digestive Comfort
The carbon dioxide in any sparkling water releases gas in your stomach, which can cause bloating, burping, or mild discomfort. Research published in gastrointestinal studies found that symptoms of stomach distension typically appear only when you drink more than about 300 milliliters (roughly 10 ounces) of a carbonated beverage. A full Liquid Death tall can is 19.2 ounces, well above that threshold, so finishing one in a sitting could leave you feeling gassy.
If you have acid reflux or irritable bowel syndrome, the carbonation can aggravate symptoms. The gas increases pressure inside your stomach, which can push stomach acid upward. For people without these conditions, the bloating is temporary and harmless. It’s not damaging your digestive tract.
The Can Factor
One genuine advantage of Liquid Death is the packaging. Aluminum cans are recycled at significantly higher rates than plastic bottles, and the brand markets itself heavily on this point. From a health perspective, aluminum cans are lined with a thin coating to prevent the metal from leaching into the liquid. This coating can contain trace amounts of BPA or BPA alternatives, though the levels in a single can are extremely small and well below regulatory limits. If you’re drinking a few cans a week, this is not a meaningful health concern.
How It Compares to Other Options
- Versus plain tap water: Nutritionally identical (for the unflavored version). Tap water wins on cost and avoids the mild acidity of carbonation.
- Versus other sparkling waters: Liquid Death unflavored is comparable to brands like Topo Chico or Perrier. The flavored versions with 2 grams of sugar are slightly sweeter than zero-calorie options like LaCroix, which uses natural flavors without any sweetener.
- Versus soda or energy drinks: Not even close. Liquid Death is dramatically lower in sugar, calories, and additives. If it helps you replace a soda habit, that’s a clear net positive for your health.
The bottom line is simple: Liquid Death sparkling water is water. The unflavored version has nothing in it that could harm you, and the flavored versions carry a trivial amount of sugar. The only real considerations are the mild acidity on your teeth with heavy daily consumption and the bloating that comes with any carbonated drink. If you enjoy the taste and the branding motivates you to drink more water instead of soda, it’s doing its job.