Ginger ale hydrates you. It is roughly 90% water, and the sugar, carbonation, and trace ginger flavoring it contains do not override that basic fact. Research on how different beverages affect hydration status shows that common soft drinks, including carbonated ones, produce urine output no different from plain water over four hours. That said, ginger ale is not an ideal hydration tool, and the reasons it falls short are more interesting than the simple yes-or-no answer.
What Hydration Research Actually Shows About Soft Drinks
The most direct evidence comes from a randomized trial that developed a “beverage hydration index,” measuring how much urine people produced after drinking equal volumes of various beverages compared with still water. Cola, diet cola, sparkling water, sports drinks, tea, coffee, orange juice, and even lager all produced cumulative urine output at four hours that was statistically no different from water.1PubMed. A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index Ginger ale was not tested specifically, but it falls squarely in the same category as cola and other carbonated soft drinks: a sugar-sweetened, carbonated, caffeine-free beverage. There is no physiological reason it would behave differently.
The key insight from that research is that what makes a beverage dehydrating is not carbonation or sugar at normal concentrations, but substances that actively increase urine production. Alcohol at higher concentrations does this. Very high caffeine doses can do it mildly. A can of ginger ale contains neither. So if you drink a glass of ginger ale, your body retains roughly the same proportion of that fluid as it would from a glass of water.
How Sugar in Ginger Ale Interacts with Fluid Absorption
A standard 12-ounce can of ginger ale contains around 32 to 36 grams of sugar, usually as high-fructose corn syrup. That sugar does interact with how your intestines absorb the liquid, but not in the way you might expect. Small amounts of glucose actually speed up water absorption. Sodium and glucose are pulled into intestinal cells together by a protein called the sodium-glucose cotransporter, and water molecules follow along. This mechanism is so effective that researchers estimate it accounts for about five liters of water absorption per day in the human intestine.2PubMed Central. Cotransport of water by the Na+/glucose cotransporter The sodium-glucose cotransporter essentially functions as a molecular water pump, pulling water into cells even against unfavorable concentration gradients.3PubMed Central. The human Na+–glucose cotransporter is a molecular water pump This is the same principle behind oral rehydration solutions used to treat dehydration from diarrhea: a precise mix of salt and sugar helps the gut absorb water faster than water alone.
Ginger ale, though, is not an oral rehydration solution. It has plenty of sugar but very little sodium. And the type of sugar matters. High-fructose corn syrup delivers a large dose of fructose, which is absorbed by a different, less efficient pathway than glucose. In a small trial of healthy adults, drinking 500 mL of a high-fructose corn syrup beverage raised serum uric acid and markers of kidney vascular resistance more than drinks sweetened with sucrose or artificial sweetener did.4Frontiers in Cardiovascular Medicine. THIRSTY FOR FRUCTOSE: Arginine Vasopressin, Fructose, and the Pathogenesis of Metabolic and Renal Disease One drink is not going to damage your kidneys, but the finding illustrates that large fructose loads are not metabolically neutral, and they do not help your body manage water the way a balanced glucose-sodium solution would.
Does Carbonation Slow Things Down?
A common intuition is that fizzy drinks sit in the stomach longer, or that the gas somehow interferes with absorption. The evidence says otherwise. A study comparing carbonated and still water consumed alongside a meal found that gastric emptying of both solids and liquids was identical between the two.5PubMed. Effect of carbonated water on gastric emptying and intragastric meal distribution Carbonation did change how the meal was distributed inside the stomach, but the total rate at which food and liquid moved onward was the same. So the bubbles in ginger ale are not delaying your hydration. They might make you feel full sooner, which could mean you drink less in a single sitting, but the liquid that does reach your intestines gets absorbed at a normal pace.
Similarly, research on beverages with varying sugar concentrations and osmolality during exercise found no significant differences in total fluid absorption between water and drinks containing about 6% carbohydrate with electrolytes, across a range of osmotic concentrations. Urine production and plasma volume changes were also the same.6PubMed. Effect of beverage osmolality on intestinal fluid absorption during exercise A typical ginger ale is a bit more concentrated than those test beverages, but the overall message is clear: moderately sugary drinks do not meaningfully impair how much fluid your body actually keeps.
The Sick-Day Reputation and What Is Really in the Can
Ginger ale’s hydration question comes up most often in one specific scenario: you’re sick with a stomach bug, someone hands you a can of ginger ale, and you wonder whether it is actually helping. The folk wisdom is that ginger settles the stomach and the liquid keeps you hydrated. The ginger part of that claim has a real scientific basis, but ginger ale delivers almost none of it.
Gingerols, the pungent compounds in ginger root, have demonstrated antiemetic effects in clinical research, with a growing body of evidence supporting their effectiveness against nausea from chemotherapy and other causes.7PubMed Central. The Antiemetic Mechanisms of Gingerols against Chemotherapy-Induced Nausea and Vomiting And ginger herbal drinks have shown effectiveness against nausea and vomiting in pregnant women during the first trimester, performing comparably to vitamin B6.8COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga. The Effect Of Ginger Herbal Drinks On Hyperemesis Gravidarum In Pregnant Women In The First Trimester So ginger, in meaningful quantities, genuinely helps with nausea.
The problem is that commercial ginger ale contains vanishingly little actual ginger. An analysis of ginger-containing food products found that beverages had far lower concentrations of the active compounds (gingerols and shogaols) than supplements or even ginger spice. Beverages averaged about 1.77 mg of these compounds per gram, while supplements averaged over 10 mg per gram.9European Journal of Integrative Medicine. Determination of the concentration of major active anti-emetic constituents within commercial ginger food products and dietary supplements A few ginger beverages did reach levels comparable to supplements on a per-serving basis, but those were concentrated ginger drinks, not mainstream ginger ales. A proteomics analysis of a commercial ginger beverage found grape and apple proteins but could not detect even a trace of ginger root protein, concluding that any ginger extract present was a minor component compared to the fruit juices used for flavor.10Journal of Proteomics. Ginger Rogers? No, Ginger Ale and its invisible proteome
If you are drinking ginger ale for nausea relief and hydration, you are getting a sugary soda that tastes vaguely of ginger. The hydration is real. The nausea relief from the ginger itself is, for most commercial brands, negligible. You’d get more antiemetic benefit from a cup of strong ginger tea or a ginger supplement.
When Ginger Ale Can Make Dehydration Worse
There is one situation where ginger ale can genuinely work against hydration: giving it to young children with diarrhea. The high sugar content, particularly the fructose and sometimes sorbitol found in soft drinks, can overwhelm the absorptive capacity of a small child’s gut. A systematic review of sugar-sweetened beverages and toddler’s diarrhea found that the high osmotic load from poorly absorbed sugars like fructose and sorbitol exceeds what a toddler’s immature intestine can handle.11The International Journal of Medical Science and Health Research. The Association Between Sugar-Sweetened Beverage Consumption and Toddler’s Diarrhea: A Systematic Review The unabsorbed sugar draws water into the intestinal lumen by osmosis, making diarrhea worse and worsening fluid loss.
This is the irony of the “flat ginger ale for a sick child” tradition. Pediatricians have pushed back against it for years. A sick toddler with vomiting and diarrhea needs an oral rehydration solution with a careful balance of glucose, sodium, and potassium. Ginger ale has too much sugar, too little sodium, and no potassium. In adults, the osmotic effect of the sugar is less of an issue because the larger, mature gut can handle it, but in small children, it can genuinely contribute to dehydration rather than preventing it.
Flavor, Sweetness, and How Much You End Up Drinking
One genuine advantage ginger ale has over plain water is that people tend to drink more of a beverage they find pleasant. This matters because the single biggest factor in staying hydrated is how much liquid you actually consume. Research on voluntary fluid intake has consistently shown that flavored, sweetened beverages increase the amount people drink compared with plain water. In one experiment, voluntary intake of a moderately liked sweetened drink exceeded water intake by over 300%.12Appetite. Impact of beverage acceptability on fluid intake during exercise
The picture gets more nuanced when you look at what specific components drive this effect. A study in boys exercising in heat found that flavoring water increased intake modestly, but adding both carbohydrates and sodium to the flavored water made the biggest difference. Plain water led to mild dehydration, flavored water reduced it somewhat, and the carbohydrate-sodium drink actually produced slight overhydration.13PubMed. Effect of drink flavor and NaCL on voluntary drinking and hydration in boys exercising in the heat Ginger ale brings flavor and carbohydrate to the table but lacks the sodium component that seems to make the biggest difference in driving voluntary intake and retention.
Interestingly, flavor alone without carbohydrates and electrolytes may not be enough to significantly boost intake in demanding conditions. A study of college basketball players training in the heat found that although flavored water received higher hedonic ratings than plain water, the difference in how much the players actually drank did not reach statistical significance.14PubMed Central. Palatable Flavoured Fluids without Carbohydrates and Electrolytes Do Not Enhance Voluntary Fluid Consumption in Male Collegiate Basketball Players in the Heat So the taste of ginger ale might encourage you to drink a bit more in casual everyday settings, but if you are exercising hard or significantly dehydrated, the flavor alone probably will not compensate for the lack of electrolytes.
Ginger Ale vs. Other Options When You Need Fluids
If you are simply thirsty and enjoy ginger ale, it will hydrate you about as well as water in practical terms. The fluid you retain from a can of ginger ale is going to be very close to what you would retain from the same volume of water, based on what the beverage hydration index research tells us about similar drinks.1PubMed. A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index You are also getting about 140 calories and 35 grams of sugar with no nutritional upside.
If you are mildly dehydrated from heat, exercise, or a mild illness, ginger ale will still hydrate you, but you could do better. A drink with some sodium, like a sports drink or even just water with a pinch of salt and a splash of juice, will be retained slightly better and will replace what you actually lost in sweat. If you are dealing with serious dehydration from prolonged vomiting or diarrhea, ginger ale is a poor choice for the reasons outlined above: too much sugar, too little sodium, and in children, the potential to make things worse.
If nausea is the main concern and hydration is secondary, skip the ginger ale and go for actual ginger. Brew ginger tea from fresh root, or take a ginger supplement that delivers a meaningful dose of gingerols. Pair that with small, frequent sips of an oral rehydration solution or diluted broth, and you are addressing both problems more effectively than a can of Canada Dry ever could.
The Dental Angle People Overlook
One health consideration that rarely comes up in hydration discussions is what ginger ale does to your teeth. Like most soft drinks, ginger ale is acidic, typically with a pH around 2.5 to 3.5. Frequent exposure to acidic beverages is a recognized driver of dental erosion, and the risk is compounded if you are already dehydrated, because reduced saliva flow means less natural protection for tooth enamel. Saliva normally buffers acids and helps remineralize enamel, so a person who is dehydrated and sipping acidic ginger ale throughout the day is creating a particularly unfavorable environment for their teeth. This is an underappreciated downside of using any soft drink as a primary fluid source, especially during illness when people tend to sip slowly over extended periods rather than drinking in discrete sittings.
If you do choose ginger ale when you are feeling unwell, drinking it with a straw and rinsing your mouth with plain water afterward can reduce the acid contact. But the broader point is that reaching for ginger ale as your go-to hydration strategy during illness means prolonged acid exposure at exactly the time your mouth is least equipped to handle it.
Diet Ginger Ale and the Sugar Variable
Diet ginger ale removes the sugar variable entirely, replacing it with artificial sweeteners that have no osmotic activity in the gut and no caloric content. From a pure hydration standpoint, diet ginger ale behaves even more like water than regular ginger ale does, because there is no sugar load for the intestines to deal with. The carbonation, as established, does not slow gastric emptying.5PubMed. Effect of carbonated water on gastric emptying and intragastric meal distribution And without fructose, the concerns about osmotic diarrhea in children and elevated uric acid in adults largely disappear.
The tradeoff is palatability. Some of the voluntary-intake advantage of sweetened drinks comes from their sugar content, not just their flavor. Sodium-glucose cotransporters in the gut respond to actual glucose, not artificial sweeteners, so diet ginger ale does not get the modest absorption boost that real sugar provides.15PubMed. Biology of human sodium glucose transporters In practice, the difference is small for someone who is not severely dehydrated. If you like the taste of diet ginger ale and it helps you drink more fluid over the course of the day, it is a perfectly reasonable hydration choice. It just is not doing anything special beyond being flavored water with bubbles.