- Sparkling waters are en vogue as a healthy, refreshing alternative to soft drinks and alcohol.
- Some claim sparkling water has injurious effects, such as reducing bone mineral density, but research shows such claims are overstated or outright myths.
- Not all sparkling waters are created equal, though. While some are just as hydrating as plain water, others can be unhealthy if not consumed in moderation.
Sparkling
waters are the latest in health chic, providing all the fizzy
refreshment of a soft drink with none of those wicked calories. Today,
Americans drink as much as 170 million gallons of sparkling water each year, and its popularity has surged to the point that The Guardian dubbed it "little short of a religion among millennials."
As
with any health food trend, questions of its validly abound. Articles
and social media posts have suggested that consuming carbonated
beverages could lead to a myriad of ailments such as zapping bones of
needed minerals, destroying tooth enamel, inflaming irritable bowel
syndrome, promoting weight gain, and (of course) causing cancer.
But
we needn't rely on hearsay. There's a fair amount of research to help
us figure out whether these drinks are good or bad for our health. Turns
out, the answer greatly depends on your bubbly beverage of choice.
Classifying sparkling waters
Photo: Flickr
Calling it "sparkling water" doesn't tell you much about what's inside.
Before
we can determine if sparkling waters are salubrious or not, we need to
determine what exactly qualifies as a sparkling water.
Carbonated
water describes water with carbon dioxide dissolved into it. Carbon
dioxide can be introduced through natural processes, or by artificially
injecting the gas into water while it is under pressure. The addition of
CO₂ gives these beverages their satisfying hiss-pop when opened and
characteristic effervescence.
Here are some popular classifications of fizzy waters:
Seltzer water. In
its simplest form, seltzer water is water with carbonation. That's it.
Seltzers may include natural flavors, but they do not contain additives
like sugar or sodium.
Club soda.
Club soda has more in common with seltzer than Coca-Cola. These drinks
add ingredients such as sodium bicarbonate or potassium sulfate to
carbonated water to elicit a minerally taste. They do not contain sugar.
Good with scotch but won't do much for red wine stains. (That's an old wives' tale.)
Tonic water.
Tonic water, on the other hand, has more in common with soda than
seltzer. Its ingredients include sugar, citric acid, preservatives, and
quinine for flavoring. Interestingly, quinine was the world's first anti-malarial drug and adds a property to tonic water that makes it glow under a blacklight. Cool party trick, but not for the health conscious.
Mineral water. The Food and Drug Administration defines mineral water
as coming from an underground source with a minimum of 250 parts per
million of total dissolved solids. These dissolved elements, such as
calcium or magnesium, must come from the source and cannot be added
later. Carbonation may be induced to make sparkling mineral water.
Like
carbonated water, "sparkling water" is an umbrella term for waters that
have undergone the carbonation process. While the two are
interchangeable, you're much more likely to find bottles of sparkling
water on store shelves. Carbonated water just lacks that ballyhoo
lyricism and, as such, has mostly been relegated to naming an ingredient
rather than a standalone beverage—it's the main ingredient in Pepsi.
Given
its catchall nature, "sparkling water" covers an immense range of
drinks. La Croix, for example, sells itself as a sparkling water but is a
seltzer with natural flavors. Other beverages sporting the label,
however, may contain additives like preservatives, sweeteners, food
coloring, and even acids or juice concentrates for flavor.
Sparkle without the soda
Sparkling
water's noxious effects have been overplayed. Claims that carbonated
beverages lead to osteoporosis and other bone diseases stem from a
misunderstanding of the research. A study in the American Journal of Clinical Nutrition
found that it was cola, not other carbonated beverages, that was
associated with lowered bone mineral density in older women, not men.
Celeste Robb-Nicholson, M.D. and editor in chief of Harvard Women's Health Watch,
noted equivalent results in other studies. Cola's caffeine was
considered a potential culprit for the lower bone mineral density, but
the studies cited a need for further research.
What
about irritable bowel syndrome? Carbonated waters have been known to
cause gastrointestinal distress in people who are sensitive to
carbonation, but they are not a known cause of the syndrome. In fact, one study found that carbonated water can improve indigestion and ease constipation.
Finally, let's consider weight gain. Here, your sparking water of choice matters.
Artificial sweeteners are incredibly poor for your health. Studies of diet soft drinks have linked them to an increased risk of dementia, transforming gut bacteria, and stimulating appetite. An American Heart Association study
even found that people "who drank a diet soda every day had a 61
percent higher risk of vascular events than those who reported no soda
drinking."
Consumers who drink
sparkling waters with sodium or artificial sweeteners like those found
in diet soda may find a similar increase in appetite and thus weight
gain. Drinking sparkling waters without these additives will remove this
potential risk.
In fact, an article reviewed by Very Well
Senior Medical Advisor Dr. Richard N. Fogoros noted that plain
carbonated water is just as hydrating as regular water, and mineral
waters with calcium and bicarbonate have been shown to improve hydration
during exercise.
Acidic considerations
Photo: Wikimedia Commons
At
pH levels below the critical pH (generally 5.5) teeth begin to
demineralize. While sparkling waters do fall below the critical pH, most
are must closer than many other popular beverages, like soda or orange
juice.
There is one criticism of sparkling water that holds true: It has the potential to damage your teeth.
Carbonic
acid is a byproduct of the reaction between water and CO₂, meaning any
carbonated water, even plain seltzer water, is acidic. Acidic
liquids—that is, anything below a 7 on the pH scale—eat
away at tooth enamel, opening one up to cavities and other dental
nasties. Luckily for sparkle enthusiasts, carbonic acid is relatively
weak.
The American Dental Association lists
Birmingham, Alabama's, municipal water as having a neutral pH level of
7.2, while sparkling mineral water Perrier has a pH of 5.25. For further
comparison, a Starbucks medium roast has a pH of 5.11 and Simply orange
juice 3.78. Beverages that incorporate the much more acidic citric acid
are even worse. Coca-Cola Classic and Pepsi, for example, have pH
levels of 2.37 and 2.39 respectively.
One
study comparing the erosive potential of sparkling mineral water to
soft drinks found the former nonthreatening by comparison.
"Dissolution levels with all of the mineral waters were very low and for several still waters were undetectable," the researchers wrote.
"Sparkling mineral waters showed slightly greater dissolution than
still waters, but levels remained low and were of the order of one
hundred times less than the comparator soft drinks."
Speaking
on the subject, dentist Andrew Swiatowicz noted that the danger seltzer
poses for your teeth depends a lot on your oral health history, how
much acid and sugar is in your diet, and the amount of fluoride you
receive from toothpaste, tap water, and mouth wash.
"For an average, healthy person, carbonated, sugar-free beverages are not going to be a main cavity-causing factor," he told The Atlantic.
"If you are at all concerned, you can always dilute the carbonated
water with regular water, or even just swish with regular water after."
Effervescent allure
Photo: Pexel
Sparkling
water can be surprisingly good for you, assuming you pick the right
one. The fresh raspberries and a mint sprig shouldn't be skipped either.
If
you want to bypass these dietary concerns, you could drink only flat,
pH-balanced water. After all, you and every organism on Earth evolved to
require this life-sustaining substance in some fashion. But this
approach, while certainly healthy, feels bland and boring. There's just
something people find appealing about a crisp, bubbly drink.
Sure,
there are risks, but these risks are no more severe than any other
non-water drink and can be mitigated by making careful choices:
- Read the label.
- Drink only seltzers or mineral waters with no additives. The additives of soda water, for example, may not add calories, but they do add sodium. If you're like the average American, you consume roughly 1,000 more milligrams of sodium than recommended a day. Why add to it?
- If you find plain carbonated water to be meh, add your own flavorings. Squeeze in a wedge of lemon, mix in some blended berries, or muddle some fresh herbs. This will ensure you get natural sugars in addition to needed nutrients.
- Drink in moderation. If you're worried about tooth decay, enjoy your sparkling water with a meal or bypass your teeth with a reusable straw.
Not
all sparkling waters are created equal, and the zeal for some of its
more illustrious name brands can certainly annoy. But as an alternative
to a soft drink or evening beer, sparkling water is a health trend that
should stay.
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