7 Side Effects of Drinking Diet Soda

Today's Health Tips

7 Side Effects of Drinking Diet Soda

By Mandy Oaklander

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Is Diet Soda Bad For You?

Why you need a diet drink detox—stat!

Deceivingly "Diet"

Pop quiz! What’s the single biggest source of calories for Americans? White bread? Big Macs? Actually, try soda. The average American drinks about two cans of the stuff every day. “But I drink diet soda,” you say. “With no calories or sugar, it’s the perfect alternative for weight watchers…. Right?”

Not so fast. Before you pop the top off the caramel-colored bubbly, know this: guzzling diet soda comes with its own set of side effects that may harm your health—from kickstarting kidney problems to adding inches to your waistline.

Unfortunately, diet soda is more in vogue than ever. Kids consume the stuff at more than double the rate of last decade, according to research in the American Journal of Clinical Nutrition. Among adults, consumption has grown almost 25%.

But knowing these 7 side effects of drinking diet soda may help you kick the can for good.

Kidney Problems

Here’s something you didn’t know about your diet soda: It might be bad for your kidneys. In an 11-year-long Harvard Medical School study of more than 3,000 women, researchers found that diet cola is associated with a two-fold increased risk for kidney decline. Kidney function started declining when women drank more than two sodas a day. Even more interesting: Since kidney decline was not associated with sugar-sweetened sodas, researchers suspect that the diet sweeteners are responsible.

Messed-Up Metabolism

According to a 2008 University of Minnesota study of almost 10,000 adults, even just one diet soda a day is linked to a 34% higher risk of metabolic syndrome, the group of symptoms including belly fat and high cholesterol that puts you at risk for heart disease. Whether that link is attributed to an ingredient in diet soda or the drinkers’ eating habits is unclear. But is that one can really worth it?

Obesity

You read that right: Diet soda doesn’t help you lose weight after all. A University of Texas Health Science Center study found that the more diet sodas a person drank, the greater their risk of becoming overweight. Downing just two or more cans a day increased waistlines by 500%. Why? Artificial sweeteners can disrupt the body’s natural ability to regulate calorie intake based on the sweetness of foods, suggested an animal study from Purdue University. That means people who consume diet foods might be more likely to overeat, because your body is being tricked into thinking it’s eating sugar, and you crave more.

A Terrible Hangover

Your first bad decision was ordering that Vodka Diet—and you may make the next one sooner than you thought. Cocktails made with diet soda get you drunker, faster, according to a study out of the Royal Adelaide Hospital in Australia. That’s because sugar-free mixers allow liquor to enter your bloodstream much quicker than those with sugar, leaving you with a bigger buzz.

Cell Damage

Diet sodas contain something many regular sodas don’t: mold inhibitors. They go by the names sodium benzoate or potassium benzoate, and they’re in nearly all diet sodas. But many regular sodas, such as Coke and Pepsi, don’t contain this preservative.

That’s bad news for diet drinkers. "These chemicals have the ability to cause severe damage to DNA in the mitochondria to the point that they totally inactivate it - they knock it out altogether,” Peter Piper, a professor of molecular biology and biotechnology at the University of Sheffield in the U.K., told a British newspaper in 1999. The preservative has also been linked to hives, asthma, and other allergic conditions, according to the Center for Science in the Public Interest.

Since then, some companies have phased out sodium benzoate. Diet Coke and Diet Pepsi have replaced it with another preservative, potassium benzoate. Both sodium and potassium benzoate were classified by the Food Commission in the UK as mild irritants to the skin, eyes, and mucous membranes.

Rotting Teeth

With a pH of 3.2, diet soda is very acidic. (As a point of reference, the pH of battery acid is 1. Water is 7.) The acid is what readily dissolves enamel, and just because a soda is diet doesn’t make it acid-light. Adults who drink three or more sodas a day have worse dental health, says a University of Michigan analysis of dental checkup data. Soda drinkers had far greater decay, more missing teeth, and more fillings.

Reproductive Issues

Sometimes, the vessel for your beverage is just as harmful. Diet or not, soft drink cans are coated with the endocrine disruptor bisphenol A (BPA), which has been linked to everything from heart disease to obesity to reproductive problems. That’s a lot of risktaking for one can of pop.

Food and Nutrition

Another Strike Against Diet Soda

by Madeline Haller February 8, 2012, 07:00 am EST

If you’ve been looking for a reason to nix your soda-drinking habits, the latest research may offer you the perfect inspiration.

                                                       
                                                                                                                           Diet: Not as harmless as it seems.

Drinking a single can of diet soda each day can increase your risk of having a heart attack or stroke, reports a recent study published in the Journal of General Internal Medicine.

The researchers monitored the soda-drinking habits of more than 2,500 individuals and compared them with the number of vascular events—heart attacks and strokes—that occurred over a 10-year period. After factoring in pre-existing conditions—diabetes, high blood pressure, BMI, and others—they found that those who were downing diet drinks on a daily basis were 43 percent more likely to experience a vascular event than those who drank none. But people who drank anywhere between 6 diet sodas per week and 1 diet soda per month had the same risk as people who never drank soda.

More from MensHealth.com: What Your Soda Can Doesn’t Tell You

What’s even more surprising: In contrast to previous research, the report found no association between regular soft drink consumption and risk of  vascular events.

So what does this mean for you? Frankly, very little. The research only found an association between drinking diet and having a heart attack or stroke—that doesn’t mean diet soda causes heart attack or strokes.  Since no other studies have found a link between diet soft drink consumption and heart attacks, more research is needed, explains lead researcher Hannah Gardner, PhD, from the Miller School of Medicine at the University of Miami.

The researchers have several theories for the connection. Even though they adjusted for weight at the beginning of the study, they didn’t collect weight measurements at the end of the 10 years or throughout the study. Since diet soda has also been linked to weight gain, it’s possible that the diet drinkers gained more weight, which increased their heart risks. (Again, just a theory.) And as we reported in our story The Truth About Diet Soda, diet soda drinkers may have worse dietary patterns overall. (Although the researchers conducted dietary surveys to adjust for this, food surveys are notoriously unreliable.) Basically, no one knows for sure what’s going on.

So what do you do while scientists search for a solution? Simple: Make H₂O your main beverage. (Squeeze in lemon or lime if you need some extra flavor.) Research even shows that drinking it can improve your mood.