Soda Water Side Effects: 7 Things to Know Before You Fizz

Last updated: 13 September 2026

Soda water side effects worry a lot of people. You hear scary claims — it ruins your teeth, melts your bones, causes cancer. But how much of that is true? Not much, it turns out. There are a few real side effects worth knowing. The rest are myths that refuse to die. Here are 7 things science says you should know before your next glass of fizzy water.

सोडा वाटर के फायदे और नुकसान (Soda Water Benefits and Side Effects)

सादा सोडा वाटर में सिर्फ पानी और कार्बन डाइऑक्साइड गैस होती है। चीनी, कैलोरी और कैफीन बिल्कुल नहीं।

फायदा यह है कि सोडा वाटर शरीर को सादे पानी जितना ही पानी देता है। मीठे कोल्ड ड्रिंक की जगह सोडा वाटर पीने पर 330 मिलीलीटर के हर कैन में करीब 139 कैलोरी बचती हैं, क्योंकि कोला में 42 कैलोरी प्रति 100 मिलीलीटर होती हैं और सादे सोडा में शून्य।

नुकसान सिर्फ दो हैं। गैस से पेट फूलना और डकार आना आम है। और जिन लोगों को पहले से एसिडिटी या GERD है, उनके सीने की जलन बढ़ सकती है। दांत, हड्डी और कैंसर वाली बातें सादे सोडा वाटर के लिए सही नहीं हैं।

Sada Soda Peene Se Kya Hota Hai?

Sada soda peene se sirf do cheezein hoti hain: pet mein gas banti hai, aur acidity waalon ko jalan badh sakti hai. Baaki kuch nahi — na calorie, na sugar, na caffeine. In English: plain soda water gives you gas and can worsen existing reflux. It adds no calories, no sugar and no caffeine.

Are Bisleri, Kinley and Lehar Soda the Same as Plain Soda Water?

Yes. Packaged Indian sodas sold as plain soda are carbonated water, so everything on this page applies to them too.

Coca-Cola India lists what is in Kinley Soda on its own brand page in four words: "KINLEY SODA: CARBONATED WATER." That is water and CO2, nothing else. Bisleri Soda and Lehar Soda sell in the same plain-soda category. Read the ingredients line on the bottle to be sure.

Sweetened fizzy drinks are a different product. Colas, sparkling juice drinks and energy sodas add sugar and acid. They carry tooth and weight risks that plain soda water does not. If your bottle lists sugar, the 7 points below are not the full story for it.

1. Does Soda Water Cause Bloating and Gas?

Yes, this one is real. CO2 gas expands inside your stomach.

When you drink soda water, the dissolved CO2 turns back into gas inside your belly. That gas has to go somewhere. It comes out as burps or causes a puffy, bloated feeling.

For most people, this is mild and lasts only a few minutes. But if you drink fast or gulp down a full glass at once, the bloating can feel worse. The fix? Sip slowly. Small sips give the gas time to escape gently.

Some people feel more bloated than others. If you are one of them, try drinking half a glass first. See how your body reacts. You can always drink more later.

2. Can Soda Water Make Acid Reflux Worse?

It may, if you already have GERD or bad acid reflux.

The CO2 bubbles increase the pressure inside your stomach. This can push stomach acid upward into your food pipe. That burning feeling in your chest? That is acid reflux.

The evidence here is weaker than most articles admit. Gut doctors at the University of Naples reviewed every survey on this and wrote:

"Some surveys showed a weak association between carbonated beverages and gastroesophageal reflux disease; however, the methodology employed was often inadequate and, on the overall, the evidence available on this topic is contradictory."
— Cuomo R, Sarnelli G, Savarese MF, Buyckx M, Nutrition, Metabolism & Cardiovascular Diseases 2009;19(10):683-9 (PMID 19502016)

The same review found stomach discomfort from the stretch only starts above 300 ml of fizzy drink in one sitting. Plain soda water is also milder than cola. Cola adds phosphoric acid and caffeine on top of the fizz.

If you have mild reflux, try small amounts of soda water. If it does not bother you, keep going. If it burns, switch to still water on bad days. Always listen to your body first.

3. Does Soda Water Damage Your Tooth Enamel?

Barely. The risk is real but very, very small compared to juice or cola.

When CO2 dissolves in water, it forms carbonic acid. This gives soda water a pH of about 3 to 5. Still water sits at pH 7. So yes, soda water is more acidic.

Parry and colleagues at the University of Birmingham tested this on real human teeth in 2001. Sparkling mineral waters did dissolve a bit more enamel than still water. But the amounts were "of the order of one hundred times less than the comparator soft drinks" (PMID 11556958).

One detail in that paper matters more than the headline. The team took the gas out of a sparkling water and tested it again. The damage barely dropped. They concluded that carbonation "may not be an important factor per se" in erosion. The sugar and acid in soft drinks do the damage, not the bubbles.

Your saliva is your best friend here. It washes away the weak acid in just a few minutes. Want extra safety? Use a straw. Rinse your mouth with plain water after drinking. Do not brush right away — wait 30 minutes for the acid to clear.

4. Does Soda Water Weaken Your Bones?

No. This myth comes from cola studies, not soda water research.

The Framingham Osteoporosis Study scanned 1,413 women and 1,125 men. Women who drank a cola every day had 3.7% lower bone density at the hip than women who drank less than one a month (PMID 17023723). The effect showed up in women, not in men.

The study's own title says the rest: "Colas, but not other carbonated beverages, are associated with low bone mineral density." The authors add that "no significant relations between noncola carbonated beverage consumption and BMD were observed."

Plain soda water has no phosphoric acid at all. The suspects in cola are phosphoric acid and caffeine. Neither is in water and CO2, so this one is a myth for plain soda.

Some fizzy mineral waters even contain calcium and magnesium. These minerals may help your bones over time. So this side effect is fully a myth for plain soda water.

5. Does Soda Water Cause Cancer?

No. There is zero evidence linking plain soda water to any form of cancer.

This myth has floated around for years. It likely started from fears about chemicals in plastic bottles or added ingredients in certain drinks. But plain soda water — just water and CO2 — has no cancer risk.

WHO has not flagged carbonated water as a cancer risk. No major health body has. If you make soda water at home with a soda maker, you also skip any bottle-related worries entirely.

6. Does Soda Water Dehydrate You?

No. Fizzy water hydrates you just as well as flat water.

British researchers gave 72 men one litre each of 13 different drinks. They then measured four hours of urine to score how well each drink held water in the body (PMID 26702122). Only rehydration salts and milk beat plain still water. Sparkling water was one of the 13 and did not score worse than still water.

The CO2 leaves as gas through your mouth. It does not stop your gut absorbing the water underneath it.

Some people actually drink more water when it is fizzy because they enjoy the taste. If that is you, fizzy water helps your hydration — not hurts it.

In hot Indian weather, staying hydrated matters a lot. If soda water gets you to drink more, that is a health win.

7. Does Soda Water Make You Gain Weight?

No. Plain soda water has zero calories and zero sugar.

The scare came from a 2017 rat study at Birzeit University (PMID 28228348). Rats drank gassy soft drinks for about a year. They gained weight faster than rats given the same drinks with the gas removed. Their ghrelin, the hunger hormone, was higher too.

That paper also had a small human arm, and most articles leave it out. Ghrelin rose in 20 healthy male students after carbonated drinks as well. So "no human study exists" is not true. What is true is that a hormone moved in 20 men in one sitting. That is a long way from proving plain soda water makes you gain weight. No trial has shown that.

The opposite claim is also weaker than it sounds. A team in Naples gave ten healthy people a 300 ml fizzy drink, scanned their stomachs, then let them eat until full (PMID 21999723). The fizz did stretch the stomach more than still water. It did not change how much they ate: 774 calories after the fizzy drink against 783 after water.

So do not drink soda water expecting it to cut your appetite. Drink it because it replaces something sweeter.

The real saving is the swap. Regular cola carries 42 calories per 100 ml, so a 330 ml can is about 139 calories (USDA 174852). Plain soda water is zero. Add a lemon slice or mint for taste and no sugar comes with it.

Who Should Be Careful with Soda Water?

Most people are fine. But three groups should watch their intake.

• GERD patients — fizz may trigger acid reflux. Try small sips first.
• IBS sufferers — extra gas may cause cramps and belly pain. Go easy.
• People with very sensitive stomachs — if plain soda water hurts, skip it. No drink is worth pain.

Everyone else can enjoy soda water daily. It is safe, healthy, and far better than sugary soft drinks.

The Smart Way to Enjoy Soda Water at Home

Make it fresh at home. It is cheaper and you control the fizz level.

The InstaCuppa Portable Soda Maker (Rs 2,199) makes fresh soda water in about 30 seconds and needs no power point.

Here is the honest running cost, checked on 13 September 2026. Our CO2 refill pack is Rs 999 for 30 capsules. That is Rs 33 a capsule, and one 8 g capsule carbonates 1 litre. So home-made soda water costs about Rs 33 a litre. This page used to say Rs 5-10. That figure was wrong and is now corrected.

Stock note, 13 September 2026: the InstaCuppa Portable Soda Maker and the CO2 capsule refill packs are both showing out of stock on our store today.

Bottled sparkling water still costs more per litre than that. A home maker also means no crates to carry. Packaged plain soda is cheaper again. So the case for a machine is convenience and fizz control, not a big saving.

Want to add taste without the bad stuff? Try our masala soda recipe or nimbu soda recipe. All natural. All healthy. All fizzy.

For more on the good side of fizzy water, read is carbonated water good for you.

Frequently Asked Questions

Is soda water bad for you at night?

Not for most people. But if you have acid reflux, avoid fizzy drinks close to bedtime. The gas and acid can feel worse when you lie down.

Can soda water cause stomach ulcers?

No. Stomach ulcers are caused by H. pylori bacteria or overuse of pain medicines. Soda water does not cause ulcers.

Is soda water safe during pregnancy?

Yes. Plain soda water with no added sugar or chemicals is safe during pregnancy. It can even help with morning sickness nausea. But check with your doctor if you have GERD.

How much soda water is too much per day?

There is no strict limit. But 2-3 glasses per day is a good range. If you feel bloated or gassy, cut back. Listen to your body and adjust.

Is Bisleri or Kinley soda the same as soda water?

Yes. Kinley Soda is listed by Coca-Cola India as carbonated water, and Bisleri and Lehar sell in the same plain-soda category. Read the ingredients line on the bottle: if it says only carbonated water, everything on this page applies.

Is soda water better than diet soda?

Yes. Diet soda has artificial sweeteners, acids, and chemicals. Plain soda water has only water and CO2. It is the cleaner choice by far.

Sources

• Cuomo R, Sarnelli G, Savarese MF, Buyckx M. Carbonated beverages and gastrointestinal system: between myth and reality. Nutr Metab Cardiovasc Dis 2009;19(10):683-9. PMID 19502016
• Parry J, Shaw L, Arnaud MJ, Smith AJ. Investigation of mineral waters and soft drinks in relation to dental erosion. J Oral Rehabil 2001;28(8):766-72. PMID 11556958
• Tucker KL, Morita K, Qiao N, Hannan MT, Cupples LA, Kiel DP. Colas, but not other carbonated beverages, are associated with low bone mineral density in older women: The Framingham Osteoporosis Study. Am J Clin Nutr 2006;84(4):936-42. PMID 17023723
• Maughan RJ, Watson P, Cordery PA, et al. A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index. Am J Clin Nutr 2016;103(3):717-23. PMID 26702122
• Eweis DS, Abed F, Stiban J. Carbon dioxide in carbonated beverages induces ghrelin release and increased food consumption in male rats. Obes Res Clin Pract 2017;11(5):534-43. PMID 28228348
• Cuomo R, Savarese MF, Sarnelli G, et al. The role of a pre-load beverage on gastric volume and food intake. Nutr J 2011;10:114. PMID 21999723
• Coca-Cola India, Kinley brand page (ingredients of Kinley Soda), read 13 September 2026. coca-colaindia.com/brands/kinley
• USDA FoodData Central, SR Legacy 174852, Beverages, carbonated, cola, regular. fdc.nal.usda.gov

InstaCuppa Portable Soda Maker

Make sparkling water & soda at home. Portable, no electricity needed, CO2 capsule system.

Rs 2,199

Out of stock as of 13 September 2026

Shop Now