Ginger ale is one of the most widely recommended home remedies for an upset stomach, but the drink itself does almost nothing medicinal. The real story splits into two parts: actual ginger root contains compounds with genuine anti-nausea effects, while commercial ginger ale contains so little ginger that it functions more like flat sugar water with bubbles. Those bubbles and that sugar can, in some cases, make stomach trouble worse rather than better.
What Real Ginger Does Inside Your Stomach
Ginger root contains a family of compounds, primarily gingerols and shogaols, that interact with receptors in the gut involved in nausea signaling and the speed at which your stomach empties. These compounds speed up the movement of food out of the stomach and increase the contractions of the stomach’s lower section, both of which can relieve that heavy, queasy feeling you get when your stomach is sluggish.
In healthy volunteers, taking about 1.2 grams of ginger powder roughly halved the time it took the stomach to empty after a meal, dropping it from around 27 minutes with a placebo to about 13 minutes with ginger.
1PubMed. Effects of ginger on gastric emptying and motility in healthy humansA similar pattern showed up in people with functional dyspepsia, a chronic condition where the stomach empties too slowly and causes discomfort. Ginger brought the half-emptying time down from about 16 minutes to about 12 minutes compared to placebo.
2PubMed Central. Effect of ginger on gastric motility and symptoms of functional dyspepsiaThe mechanism works through serotonin receptors in the gut lining and through cholinergic pathways that control stomach muscle contractions.
3PubMed. Can nausea and vomiting be treated with ginger extract?Why Ginger Ale Falls Short
Here is where the home remedy breaks down. A laboratory analysis comparing the active anti-nausea compounds across different ginger products found that commercial ginger beverages contained roughly 1.77 milligrams of active compounds per gram of product. Compare that to ginger supplements, which averaged about 10 milligrams per gram, or ground ginger spice at around 9 milligrams per gram. Even ginger candies, at about 0.43 milligrams per gram, outperformed ginger teas at 0.13 milligrams per gram.
4European Journal of Integrative Medicine. Determination of the concentration of major active anti-emetic constituents within commercial ginger food products and dietary supplementsA proteomics study of a commercial ginger ale found something even more striking: researchers could not detect any ginger root proteins in the drink at all. They found grape and apple proteins (the manufacturer confirmed the beverage contained grape and apple juice), and the drink did have a gingery taste from some flavoring, but the actual ginger content was negligible.
5Journal of Proteomics. Ginger Rogers? No, Ginger Ale and its invisible proteomeMost mass-market ginger ales are flavored with synthetic ginger flavoring or trace amounts of ginger extract. You would need to drink an impractical volume to approach the roughly 1 gram of ginger that clinical studies have used. And drinking that volume would bring its own problems, which brings us to the carbonation and sugar.
How Carbonation Can Backfire
The fizz in ginger ale feels soothing to many people, and there is a logic to it: the cold, tingling sensation can be distracting and pleasant when you feel nauseated. But carbonation introduces carbon dioxide gas into the stomach, which creates its own set of issues.
Research on carbonated beverages found that all of them produced a sustained reduction of 30 to 50 percent in the strength of the lower esophageal sphincter, the muscular valve between the stomach and the esophagus. In over 60 percent of cases, the reduction was severe enough to reach a level that would normally indicate sphincter incompetence. Tap water caused no such reduction.
6PubMed. Response of the lower esophageal sphincter to gastric distention by carbonated beveragesWhen that valve weakens, stomach acid can splash back up into the esophagus, which is the mechanism behind acid reflux and heartburn. If your nausea involves any kind of acid reflux component, a fizzy drink may make you feel worse. The gas itself can also cause bloating and increase the feeling of stomach distension, which is not what you want when you are already queasy.
Interestingly, one magnetic resonance imaging study found that carbonation was the dominant factor in how quickly a drink left the stomach, accounting for 84 percent of the variation in emptying time, while carbohydrate content had no significant effect.
7PubMed. Gastric gas and fluid emptying assessed by magnetic resonance imagingThe Sugar Problem
A standard can of ginger ale contains somewhere around 30 to 40 grams of sugar, comparable to most other sodas. When you are dealing with an upset stomach, and especially when diarrhea is part of the picture, high-sugar drinks can pull water into the intestines through osmosis, potentially worsening diarrhea rather than helping it.
Clinical guidelines for managing acute gastroenteritis, particularly in children, specifically advise against carbonated drinks. The reasoning is straightforward: their high osmolality and low sodium content can aggravate diarrhea rather than help with rehydration.
8PubMed Central. Acute gastroenteritis in childrenIf you are vomiting and need to stay hydrated, you want something with a balanced electrolyte profile, not a blast of sucrose. Oral rehydration solutions exist specifically for this purpose. Sipping flat ginger ale at room temperature is less harmful than drinking it cold and fizzy, but it is still essentially sugar water at that point.
Where Ginger Actually Works Well
The strongest evidence for ginger as an anti-nausea remedy comes from pregnancy-related nausea and vomiting. A meta-analysis found that taking about 1 gram of ginger daily for at least four days was associated with a five-fold likelihood of improvement in early pregnancy nausea and vomiting.
9The Journal of the American Board of Family Medicine. Effects of Ginger for Nausea and Vomiting in Early Pregnancy: A Meta-AnalysisAnother review looking at first-trimester use found that ginger improved nausea and vomiting scores by about four points on a 40-point scale and stopped vomiting entirely in roughly one out of three women by six days of use.
10PubMed Central. Ginger for nausea and vomiting of pregnancyThere is also evidence supporting ginger as an add-on treatment for chemotherapy-induced nausea, though the research is less uniformly positive. Multiple studies have evaluated ginger as an adjunct treatment in this context and found it both effective and safe.
11PubMed Central. The Effectiveness of Ginger in the Prevention of Nausea and Vomiting during Pregnancy and ChemotherapyMotion sickness, however, is where ginger’s reputation gets shakier. One older study directly compared three doses of ginger to standard motion sickness drugs and found that all three ginger doses performed at placebo level, while conventional drugs like dimenhydrinate, promethazine, and scopolamine provided significant protection.
12PubMed. Comparison of efficacy of ginger with various antimotion sickness drugsA more recent trial comparing ginger extract to a multi-ingredient supplement for chronic motion sickness found that while both treatments helped, ginger was less effective than the comparison product across all measured outcomes.
13PubMed Central. A Combination of Gamma-Aminobutyric Acid, Glutamic Acid, Calcium, Thiamine, Pyridoxine, and Cyanocobalamin vs Ginger Extract in the Management of Chronic Motion SicknessSo ginger’s anti-nausea power depends a lot on what kind of nausea you have. It seems most useful for slow-stomach-emptying nausea and pregnancy nausea, modestly helpful for chemotherapy nausea as an add-on, and not particularly reliable for motion sickness.
The Comfort Factor Is Real, Though
If ginger ale has helped you feel better in the past, that experience is not imaginary, but the explanation is probably more psychological than pharmacological. Placebo effects on nausea are remarkably strong. A study using simulated motion sickness found that a placebo treatment significantly reduced nausea symptoms, and this effect held up even when participants were experimentally stressed beforehand.
14PubMed Central. Placebo effects on nausea and motion sickness are resistant to experimentally-induced stressAn experiment using a balanced placebo design, where some participants received real ginger, some a placebo, and some were told they were getting ginger regardless of what they actually received, found no main effect of actual ginger and no main effect of being told you were getting ginger on nausea outcomes. Neither the pharmacological nor the expectation component, tested independently, showed a clear effect in that particular setup.
15PLOS ONE. Effects of Ginger and Expectations on Symptoms of Nausea in a Balanced Placebo DesignThe broader point is that nausea is heavily influenced by context, expectation, and sensory experience. The tastes, temperatures, and cultural associations of foods and drinks all shape how they make us feel, in ways that go beyond their chemical composition.
16MBR. The Total Food Effect: Exploring Placebo Analogies in Diet and Food CultureIf your mother handed you ginger ale when you were sick as a child, the association between that flavor, that fizz, and being taken care of may genuinely reduce nausea through expectation and conditioned response. That is a real effect, just not a ginger effect.
What to Actually Do When Your Stomach Is Upset
If you want ginger’s actual benefits, skip the soda and go for the real thing. The dose that shows up consistently in clinical trials is around 1 gram per day, roughly equivalent to a teaspoon of freshly grated ginger root, a couple of ginger capsules, or a strong cup of ginger tea made by simmering sliced fresh ginger for ten to fifteen minutes. Ginger chews and candies made with real ginger extract are another option, though their active compound content varies widely by brand.
For rehydration during a stomach bug, plain water or an oral rehydration solution is a better choice than any soda. If plain water sounds unappealing, diluted broth gives you some sodium and feels warm and soothing. Flat, room-temperature ginger ale is not the worst option in the world, but recognize that you are mostly drinking sugar water with nostalgic flavor.
If nausea is your main complaint and not diarrhea, small sips of cool or cold liquids tend to be easier to keep down than large gulps of anything. There is some evidence that even just the smell of ginger can help. A study on post-chemotherapy patients found that ginger aromatherapy significantly reduced nausea and vomiting scores compared to a control group.
17KEMAS: Jurnal Kesehatan Masyarakat. Aromatherapy Ginger Use in Patients with Nausea & Vomiting on Post Cervical Cancer ChemotherapySafety Considerations With Real Ginger
Ginger is broadly safe at the doses used in studies, but it deserves a mention for people on blood thinners or those with bleeding disorders. Because ginger has been shown in laboratory settings to affect platelet aggregation, it is commonly flagged as a supplement to avoid before surgery or when using anticoagulant medications. A systematic review of the evidence on this question found that while laboratory and some clinical data suggest ginger inhibits platelet clumping, the clinical evidence remains mixed, with significant limitations in study design, inconsistent dosing, and a lack of standardized ginger preparations across trials.
18PLOS ONE. The Effect of Ginger (Zingiber officinale) on Platelet Aggregation: A Systematic Literature ReviewThe practical takeaway: if you are taking warfarin, aspirin, or another blood thinner, mention ginger supplementation to your doctor. The occasional cup of ginger tea is unlikely to cause a problem, but concentrated ginger capsules at high doses are a different story. For pregnant women, the evidence on safety at the standard 1 gram daily dose has been reassuring across multiple trials, though it is still worth flagging with a healthcare provider.
How Ginger Affects Gut Bacteria
An emerging and more speculative area of research looks at what ginger does to the microbial community in your gut. A recent study using an in vitro model of human gut bacteria found that ginger shifted the balance of microbial populations, reducing the abundance of one major bacterial group (Bacteroidota) and increasing another (Proteobacteria). It also enriched metabolic pathways related to lipid and amino acid processing.
19Journal of Microbiology and Biotechnology. Impact of Ginger on Gut Microbiota Composition and Function in a Bacteroides-Dominant EnterotypeWhether these microbial shifts translate into meaningful digestive benefits in living humans is still unknown. The study was conducted in a lab setting, not in actual people, and the doses were tiny. But it opens an interesting avenue: part of ginger’s traditional reputation as a digestive aid might eventually be explained by how it interacts with gut bacteria, not just stomach receptors. For now, this is an area to watch rather than act on.
What Your Drink Choice Might Be Doing to Your Gut
If you are reaching for ginger ale because your stomach has been off, it is worth considering whether your broader beverage habits could be contributing to the problem. A study tracking dietary triggers and gastrointestinal symptoms found strong associations between caffeinated coffee and diarrhea within one to two hours of drinking, between alcoholic beverages and multiple gut symptoms over the following several days, and between artificial sweeteners and various symptoms over one to three days.
20PubMed. Coffee, Alcohol, and Artificial Sweeteners Have Temporal Associations with Gastrointestinal SymptomsDiet ginger ale, which swaps sugar for artificial sweeteners, might introduce its own digestive complications. And if you are combining your ginger ale habit with coffee or alcohol, those may be contributing more to your stomach problems than ginger ale is helping. The most useful thing you can do for a chronically upset stomach is look at the full picture of what you are eating and drinking, rather than pinning your hopes on one remedial beverage.