Vitaminwater is not an ideal drink when you’re sick. While it does contain vitamins like C and B, a single 20-ounce bottle also packs 32 grams of added sugar, which can work against your recovery. Plain water, broth, and electrolyte drinks designed for rehydration are better choices for staying hydrated through a cold, flu, or stomach bug.
What’s Actually in a Bottle
A standard 20-ounce bottle of Vitaminwater contains about 120 calories and 32 grams of added sugar. That’s roughly the same sugar load as a can of soda. The bottle also supplies B vitamins, vitamin C, and varying amounts of other micronutrients depending on the flavor.
The vitamins themselves aren’t the problem. Research shows that synthetic B vitamins, the type used in fortified drinks, are absorbed at rates comparable to their natural counterparts. Your body can use them. The issue is the vehicle they come in. You can get those same vitamins from a simple multivitamin, a glass of orange juice, or a bowl of soup without the sugar payload.
The Sugar Problem During Illness
When you’re sick, your digestive system is already under stress. High-sugar beverages can make things worse, especially if you’re dealing with nausea, vomiting, or diarrhea. The sugar pulls water into your intestines through a process called osmotic draw, which can actually increase fluid loss rather than prevent it. Research published in pediatric gastroenterology literature found that high sugar content in oral fluids is a more likely cause of worsening diarrhea than high sodium content, because temporary carbohydrate malabsorption is common during acute illness.
In other words, a sugary drink during a stomach bug can backfire. Instead of rehydrating you, it can send more water into your gut and out of your body.
Do the Vitamins Help You Recover?
Vitamin C and zinc are the two nutrients most studied for cold recovery. Regular vitamin C supplementation reduces cold duration by about 8% in adults, which translates to roughly half a day shorter for an average cold. That’s a modest benefit, and it comes from consistent daily supplementation, not from drinking a bottle of vitamin-fortified water after symptoms start.
Zinc has stronger evidence behind it. A systematic review of randomized controlled trials found that zinc supplementation can shorten a cold by about 2.25 days. But the effective doses in those studies came from zinc lozenges or capsules taken every two to three hours while awake, delivering between 10 and 43 milligrams of zinc per dose. That’s a very different delivery method and dosage than what you’d get from a flavored water. The zinc in Vitaminwater, if present at all depending on the flavor, is nowhere near the therapeutic range used in clinical trials.
So while the label might look reassuring, the vitamin content in Vitaminwater is unlikely to meaningfully speed up your recovery from a cold or flu.
What About Vitaminwater Zero?
Vitaminwater Zero eliminates the sugar but replaces it with erythritol, stevia leaf extract, and sorbitol. This solves the calorie and blood sugar issue, but sugar alcohols like erythritol and sorbitol can cause bloating, gas, and loose stools in some people, particularly when the gut is already irritated from illness. If your stomach is already sensitive, these sweeteners could add to your discomfort.
Vitaminwater Zero is a better option than the original if you’re set on the brand, but it’s still not the best choice for sick-day hydration.
What to Drink Instead
The CDC recommends clear fluids for managing dehydration during illness: water, broth, or sports drinks. For children, pediatric electrolyte solutions like Pedialyte are preferred because they’re formulated with the right balance of sodium, potassium, and a small amount of glucose to maximize fluid absorption without overwhelming the gut.
Here’s what works well for most illnesses:
- Water is the simplest and most effective option for staying hydrated with a cold or mild flu.
- Broth provides sodium and potassium, which you lose through sweat and fever, and it’s gentle on an upset stomach.
- Electrolyte drinks formulated for rehydration (Pedialyte, or diluted sports drinks) replace minerals lost through vomiting or diarrhea more effectively than sugar-heavy beverages.
- Herbal tea offers warmth and hydration without sugar or caffeine. Avoid caffeinated teas, which can increase fluid loss.
If you have a fever, your body loses fluid faster than normal through sweating and increased breathing rate. The priority is replacing that fluid with something your body can absorb quickly. A drink with 32 grams of sugar works against that goal. A drink with sugar alcohols may irritate an already fragile gut. Plain water or a properly balanced electrolyte solution does the job without the trade-offs.
The Bottom Line on Vitaminwater and Illness
Vitaminwater occupies an awkward middle ground. It has more sugar than you want during illness and less of the vitamins and minerals that actually help than you’d need. The nutrients it does contain are available in better forms, whether that’s a simple multivitamin, a zinc lozenge, or a glass of orange juice. And the sugar or sugar alcohols can genuinely worsen symptoms if your stomach or intestines are involved. Reaching for water, broth, or a proper electrolyte drink will do more for your recovery than any bottle with “vitamin” on the label.