Regular soda is not a good choice during pregnancy. It delivers a large dose of added sugar or artificial sweeteners with no meaningful nutrition, and it displaces drinks that actually support a growing baby. An occasional small serving is unlikely to cause harm, but daily soda is a habit worth changing.
Pregnancy raises your fluid needs and your body’s sensitivity to blood sugar. What you drink matters more now than at almost any other time. This article covers what the evidence shows about soda in pregnancy, where the real risks sit, and what to drink instead.
Is Soda Bad For Pregnancy Risks And Alternatives?
Yes, regular soda carries real downsides in pregnancy, mostly through added sugar and empty calories. The clearest concerns are excess sugar intake, weight gain beyond recommended ranges, and gestational diabetes risk. Diet soda avoids the sugar but raises separate questions about artificial sweeteners, where the evidence in pregnancy is less settled.
Most guidance for pregnant women points toward limiting added sugars and choosing water as the main drink. Soda fits poorly into that picture. It provides no protein, no fiber, no meaningful vitamins or minerals, and no hydration advantage over water.
The honest position is that a single soda now and then is not a known danger. The problem is the pattern. Many people drink soda daily without thinking of it as a sugar source, and during pregnancy that pattern matters more.
What Does the Sugar in Soda Actually Do During Pregnancy?
A 12-ounce can of regular cola contains roughly 39 grams of sugar. That is close to the amount the American Heart Association suggests women limit themselves to in an entire day from all added sugars combined. One can can use up most of that budget.
Your body handles sugar by releasing insulin, which moves glucose from your blood into your cells. Pregnancy naturally makes the body less sensitive to insulin. This is a normal adaptation that helps ensure the baby gets enough glucose. But it means your system is already working harder to manage blood sugar.
Adding large amounts of rapidly absorbed liquid sugar on top of that can push blood glucose higher than it would otherwise go. Over time, consistently high sugar intake contributes to excess weight gain and raises the chance of developing gestational diabetes. Gestational diabetes is a real condition that affects both mother and baby, and it requires medical management.
Liquid sugar is also easy to overconsume. Your body registers solid food calories with more satiety signals than it does drinks. A can of soda adds calories without making you feel full, so it tends to add to your total intake rather than replace part of it.
Does Diet Soda Have Risks in Pregnancy?
The evidence on diet soda in pregnancy is genuinely mixed, and no large human trial has confirmed harm. That is the honest summary. Diet soda removes the sugar problem but introduces questions about artificial sweeteners that researchers are still working through.
Some observational studies have reported associations between high diet soda intake during pregnancy and outcomes such as preterm birth or higher infant weight. These studies are observational, which means they show a link, not cause and effect. Women who drink a lot of diet soda may differ from those who do not in ways researchers cannot fully account for.
Regulatory bodies that review sweetener safety, including the U.S. Food and Drug Administration, have set acceptable daily intake levels for approved sweeteners. Those levels are generally set well above typical consumption. Pregnancy does not currently carry a blanket warning against approved sweeteners, but “approved” is not the same as “studied extensively in pregnancy.”
What we can say with confidence: diet soda is not a nutritional upgrade. It does not hydrate better than water, and it does not add anything your body needs during pregnancy. If you are choosing between regular and diet soda, the better move is usually to reduce both.
Does Caffeine in Soda Matter During Pregnancy?
Yes, caffeine is worth tracking, and colas and some other sodas contain it. A 12-ounce regular cola typically has around 30 to 40 milligrams of caffeine. That is less than coffee, but it adds up if you also drink tea, coffee, or chocolate.
Major health organizations generally advise pregnant women to keep caffeine intake at or below about 200 milligrams per day. That is a widely cited threshold. Caffeine crosses the placenta, and the developing baby cannot metabolize it the way an adult does, which is why the limit exists.
A single cola is unlikely to push you over that limit. Several sodas plus a coffee could. If you are watching caffeine, count soda in your daily total rather than treating it as separate.
What About Other Ingredients in Soda?
Most soda ingredients are not specifically dangerous in pregnancy, but a few deserve a mention. Phosphoric acid, found in many colas, is associated with lower bone density in some research, though the effect in pregnancy specifically is not well studied. The bigger issue remains the sugar and the habit.
Some sodas contain herbal additives or “natural” flavorings. Herbal ingredients are not automatically safe in pregnancy, and the evidence on most of them is limited. If a soda lists an unfamiliar botanical ingredient, it is reasonable to be cautious rather than assume it is fine.
Energy sodas are a separate category. They often combine caffeine with other stimulants and can push caffeine intake higher than a standard cola. These are best avoided during pregnancy unless a clinician specifically approves them.
What Should You Drink Instead?
Water is the best default, and it meets your hydration needs without adding sugar or caffeine. Pregnancy increases your fluid needs, so having water within reach throughout the day helps. If plain water is boring, there are plenty of better options than soda.
- Sparkling water gives you the fizz without the sugar. Check the label for added sweeteners if you want it plain.
- Water with fruit — lemon, lime, cucumber, or berries — adds flavor with no added sugar.
- Milk and fortified plant milks provide protein, calcium, and often vitamin D, which matter during pregnancy.
- Unsweetened tea offers flavor with modest caffeine; watch your total caffeine intake.
- 100% fruit juice in small amounts can fit, but it is still sugary and should not replace water.
If you crave the taste of soda, a small serving occasionally is a reasonable compromise for most people. The goal is not perfection. It is making soda the exception rather than the everyday drink.
How Much Soda Is Too Much?
There is no official “safe” number of sodas for pregnancy, because no guideline sets one. The general direction from health authorities is to limit added sugars and choose water. That makes daily soda hard to justify, while an occasional one is unlikely to be a problem.
Rather than fixating on a number, look at the pattern. If soda is your main drink, that is the signal to change. If it is a treat a few times a week or less, and your overall diet is balanced, you are likely in reasonable territory. Talk with your clinician about your specific situation, especially if you have gestational diabetes or are gaining weight faster than recommended.
Frequently Asked Questions
Is it safe to drink soda while pregnant?
An occasional soda is unlikely to cause harm, but regular soda is not recommended because it adds sugar and empty calories. Water is the better everyday choice.
Can drinking soda cause gestational diabetes?
No single drink causes gestational diabetes, but high sugar intake contributes to excess weight gain and higher blood sugar, both of which raise risk. Reducing added sugars is a reasonable step.
Is diet soda safer than regular soda during pregnancy?
Diet soda avoids sugar but the evidence on artificial sweeteners in pregnancy is limited and mixed. Neither type is a nutritional upgrade, so reducing both is the safer approach.
How much caffeine is in a cola?
A 12-ounce regular cola typically has around 30 to 40 milligrams of caffeine. Pregnant women are generally advised to stay at or below about 200 milligrams per day from all sources.
