Does Carbonated Water Harden Your Arteries? The Truth
On this page 6 sections
- Does Carbonated Water Harden Your Arteries? The Truth
- Check the Label for Added Sugar and Acids in Carbonated Drinks
- Know Who Should Limit Carbonated Drinks With Sodium and Minerals
- How Carbonated Water Compares to Other Drinks for Heart Health
- How to Safely Enjoy Carbonated Water Without Affecting Your Arteries
- Frequently Asked Questions
You’ve likely heard claims that sparkling water might cause artery hardening, which can sound alarming if you’re switching from soda to fizzy water for health reasons. This article separates fact from myth, explaining what carbonated water is, how it affects your body, and what to watch for in related drinks.
Understanding the science behind carbonation and arterial health helps you enjoy sparkling water safely without unnecessary worry.
Does Carbonated Water Harden Your Arteries? The Truth
Carbonated water does not harden your arteries or cause arterial plaque. It is simply water infused with carbon dioxide gas, which forms carbonic acid — a very weak acid that does not contribute to arterial calcification.
Carbonation works by dissolving carbon dioxide (CO2) under pressure in water. When you open a bottle or can, the gas escapes, creating bubbles. The dissolved CO2 reacts with water to form carbonic acid (H2CO3), but this acid is much weaker than stomach acid or other dietary acids.
Arterial hardening, or atherosclerosis, involves the buildup of calcium deposits and fatty plaques in artery walls. This process is distinct from dietary calcium intake, which does not directly translate into artery calcification. The calcium in your diet or beverages like milk is regulated differently by your body than pathological deposits that cause artery stiffness.
Scientific studies have not found any link between drinking plain carbonated water and worsened artery health. Research emphasizes that the carbonation itself is harmless to your blood vessels and does not increase plaque formation.
What does raise heart disease risk are added sugars and other additives often found in soft drinks. Sugar promotes inflammation, raises blood pressure, and can lead to metabolic changes that contribute to artery damage. So it’s the added ingredients, not carbonation, that you should watch out for.
Check the Label for Added Sugar and Acids in Carbonated Drinks
Plain carbonated water is not bad for your arteries, but added sugars and certain acids in carbonated drinks can raise your cardiovascular risk. Not all acids are equal — carbonic acid in seltzers is weak, while phosphoric acid in colas is stronger and linked with artery damage.
Phosphoric acid, commonly added to cola drinks, may contribute to arterial stiffness and increased blood pressure. Its acidity and interaction with minerals in the body can affect heart and vessel health over time.
Sugar is a bigger concern. Drinks with high added sugar cause blood sugar spikes that increase blood pressure and trigger inflammation. These effects raise your risk of artery damage and heart disease.
Reading the nutrition label is crucial. Watch for added sugars listed as sucrose, high-fructose corn syrup, or other sweeteners. Also check the ingredient list for acids like phosphoric or citric acid, which can impact your metabolism and vascular health.
| Acid Type | Source | Effect on Arteries |
|---|---|---|
| Carbonic Acid | Plain carbonated water | Mild acidity, no harm to arteries |
| Phosphoric Acid | Colas and some sodas | May increase artery stiffness and blood pressure |
| Citric Acid | Some flavored waters and sodas | Mild acidity, generally safe but can affect tooth enamel |
Know Who Should Limit Carbonated Drinks With Sodium and Minerals
Plain carbonated water itself does not raise blood pressure, but some sparkling waters contain sodium and minerals that affect blood pressure, especially in salt-sensitive individuals.
| Type of Carbonated Water | Typical Sodium Content (mg per 12 oz) |
|---|---|
| Seltzer water | 0 |
| Club soda | up to 100 |
| Mineral water | varies widely, 10 to 200+ depending on source |
| Tonic water | about 60 to 80 |
Club soda often contains added sodium bicarbonate or sodium chloride to mimic mineral waters’ taste. This added sodium can raise blood pressure in people sensitive to salt, such as those with hypertension or older adults.
Mineral waters vary in sodium and mineral content because they come from natural sources. Most do not harden arteries, but if you have high blood pressure, watch for high sodium levels on the label.
If you have hypertension or are salt-sensitive, choose low-sodium sparkling waters or plain seltzer that has zero sodium. You can also carbonate your own water at home to avoid added minerals and sodium.
How Carbonated Water Compares to Other Drinks for Heart Health
Sparkling water is healthier for your arteries than sugar-sweetened sodas and diet sodas because it contains no added sugars or artificial sweeteners that raise cardiovascular risk.
Replacing sugary drinks with plain carbonated water can reduce calorie and sugar intake, which benefits heart health and helps lower blood pressure and weight.
Some mineral waters supply beneficial trace minerals like magnesium and calcium, which may support heart function, though the amounts vary and are generally small.
Avoid tonic water and flavored sparkling waters with added sugars or sweeteners, as they can raise blood sugar and contribute to artery damage over time.
Sparkling water cannot directly replace medications or treatments for heart conditions, but it is a good alternative to sugary drinks for daily hydration and artery health.
Some people believe carbonated water helps clear phlegm, but the evidence is limited; it is safe to drink but should not replace medical treatment for respiratory issues.
How to Safely Enjoy Carbonated Water Without Affecting Your Arteries
You can drink plain carbonated water daily without harm to your arteries. About 8 to 16 oz (one to two cups) per day is safe for most adults, as carbonation itself does not cause arterial hardening.
Choose plain seltzer or make your own carbonated water at home to avoid added sugars, sodium, and acids found in flavored or club sodas. These additives, not carbonation, pose risks to your cardiovascular health.
Limit your total daily intake of sodium and added sugars as these can raise blood pressure and increase artery disease risk. Check the nutrition label to keep added sugars under about 25 g (women) or 36 g (men) per day, and watch sodium if you are salt-sensitive or have hypertension.
If you have a colonoscopy or any procedure requiring clear liquids, follow your clinic’s instructions carefully. Usually, plain carbonated water is allowed until about two hours before the procedure, but flavored or mineral waters might not be permitted.
Carbonated water is a safe and refreshing alternative to sugary sodas. If you want flavor, try adding a splash of fresh lemon or cucumber instead of buying pre-flavored sparkling waters with additives.
If you’ve already consumed carbonated water before a colonoscopy, it’s unlikely to affect your prep unless it contained sugars or other additives. Always defer to your healthcare team’s guidance about permitted drinks.