San Pellegrino is a perfectly healthy drink. It hydrates as well as flat water, delivers a meaningful dose of minerals like calcium and magnesium, contains almost no sodium, and has zero calories. The few potential downsides are minor and manageable for most people.
What’s Actually in It
San Pellegrino is natural mineral water sourced from the Italian Alps, with carbon dioxide added during bottling. It’s not naturally carbonated, despite the “natural mineral water” label. The minerals, however, are genuinely from the source.
A liter of San Pellegrino contains about 150 mg of calcium, 41 mg of magnesium, and a total dissolved solids count of 900 mg/L. That calcium number is notable: a liter gets you roughly 15% of your daily recommended intake, just from water. The magnesium contributes around 10% of what most adults need. These aren’t trivial amounts, especially if you’re drinking a bottle or two throughout the day.
Sodium content is negligible. A full liter contains about 31 mg of sodium. For context, the WHO recommends limiting sodium to under 2,000 mg per day, so you’d need to drink more than 60 liters to approach that ceiling from Pellegrino alone. It’s a non-issue, even on a low-sodium diet.
Hydration Compared to Still Water
Sparkling mineral water hydrates your body just as effectively as flat water. The carbonation doesn’t interfere with absorption. In fact, the mineral content may offer a slight advantage. Minerals like calcium, magnesium, and sodium help your body retain the water you drink. Without adequate minerals, plain water passes through you faster. As one hydration researcher at the University of Hartford put it, whatever plain water you drink without enough minerals, “you’ll just pee out.”
There’s also a practical benefit: people who find plain water boring tend to drink more when it’s sparkling. If Pellegrino helps you stay hydrated throughout the day, that alone makes it a net positive for your health.
Digestive Effects
Carbonated water can actually help with digestion and constipation. The bubbles stimulate nerves involved in the digestive process, which may improve gastric motility and relieve that heavy, bloated-after-eating feeling. Some people with chronic indigestion report that sparkling water reduces their symptoms.
There’s also evidence that carbonation increases feelings of fullness. If you’re trying to eat less, drinking sparkling water with meals may help you feel satisfied sooner. That said, one animal study found the opposite effect: rats given carbonated beverages showed elevated levels of a hunger hormone called ghrelin and ate more food over time. A small parallel study in 20 human males showed a similar spike in ghrelin after drinking carbonated beverages. This hasn’t been widely replicated in broader human trials, though, and the overall evidence leans toward carbonated water helping control appetite rather than increasing it.
The one digestive downside is straightforward. If you’re prone to gas or bloating, the carbon dioxide can make it worse. This is individual. Some people tolerate it without issue, while others feel uncomfortably full after a glass or two.
Is It Bad for Your Teeth?
This is the most common concern, and it deserves a nuanced answer. San Pellegrino has a pH of about 4.28. Tooth enamel begins to soften at a pH of 5.5, so yes, Pellegrino is acidic enough to cause some demineralization on contact.
But context matters. The acidity of sparkling mineral water is far milder than sodas, fruit juices, or even orange juice, all of which sit well below a pH of 4. Your saliva naturally neutralizes mild acids within minutes. The risk to enamel becomes real only with prolonged, frequent exposure, like sipping constantly throughout the day without breaks, or swishing the water around your teeth. Drinking it with meals, or in a few sittings rather than nonstop, keeps enamel exposure minimal. For most people, the erosion risk from plain sparkling water is not clinically significant.
No Evidence It Weakens Bones
The idea that carbonated water leaches calcium from bones is one of those persistent health myths that doesn’t hold up. The concern originally came from research on cola, which contains phosphoric acid. Phosphoric acid can theoretically interfere with calcium absorption. But San Pellegrino and other sparkling mineral waters don’t contain phosphoric acid.
A clinical trial published in the British Journal of Nutrition compared postmenopausal women who drank about a quart of carbonated mineral water daily with those who drank the same amount of still mineral water. After eight weeks, blood and urine markers of bone turnover were identical between the two groups. Larger observational studies have confirmed that non-cola carbonated drinks show no association with low bone mineral density. If anything, the calcium in mineral water like Pellegrino supports bone health rather than undermining it.
How It Compares to Other Sparkling Waters
Not all sparkling waters are created equal. Most brands like LaCroix or store-brand seltzer are carbonated tap water with no significant mineral content. They’re fine for hydration, but they don’t offer the calcium and magnesium that Pellegrino does. Other mineral waters like Gerolsteiner or Topo Chico have their own mineral profiles, some higher, some lower.
What sets Pellegrino apart is its relatively high mineral density at 900 mg/L of total dissolved solids. That’s firmly in the “rich mineral water” category. You’re not just drinking flavored bubbles. You’re getting a measurable nutritional contribution with every glass, and no sugar, no artificial sweeteners, and essentially no sodium to worry about.