Warm broth, herbal tea, and plain water consistently rank among the most helpful drinks during illness, but the best choice depends on your specific symptoms. A stuffy nose responds well to hot liquids that promote mucus flow, a sore throat can benefit from honey stirred into tea, and a stomach bug calls for drinks that replace lost electrolytes. The science behind these recommendations is more interesting than “just stay hydrated,” though hydration is the foundation everything else builds on.
Why Fluids Matter More When You’re Sick
Fever, sweating, vomiting, and diarrhea all pull water out of your body faster than normal. Even a mild cold increases fluid loss through nasal secretions and mouth breathing. Replacing that fluid keeps your mucous membranes moist, helps thin secretions so they’re easier to clear, and supports the basic cellular work your immune system is doing around the clock. Dehydration during illness doesn’t just make you feel worse; it can slow recovery by reducing blood volume and making it harder for immune cells to travel where they’re needed.
Plain water is perfectly fine for most common illnesses. But when you’re losing fluids rapidly through vomiting or diarrhea, water alone may not be enough because it doesn’t replace the sodium and potassium that leave with those fluids. That’s where oral rehydration solutions and electrolyte drinks come in. The intestinal lining absorbs water most efficiently when sodium and glucose are present together, which is why oral rehydration formulas pair sugar with salt rather than relying on either alone.1PubMed. Coupled sodium/glucose cotransport by SGLT1 requires a negative charge at position 454
Hot Liquids for Congestion
If you’re stuffed up and miserable, the temperature of your drink may matter as much as what’s in it. A study measuring nasal mucus velocity found that sipping hot water increased the speed at which mucus moved through the nose, going from about 6 to roughly 8 millimeters per minute. Hot chicken soup performed even better, pushing that number above 9. Cold water, by contrast, actually slowed mucus flow below baseline.2PubMed. Effects of drinking hot water, cold water, and chicken soup on nasal mucus velocity and nasal airflow resistance The effect was temporary, returning to normal within half an hour, but during that window your nose genuinely drains better. The likely reason is steam: inhaling water vapor from a hot mug warms the nasal passages and loosens thick secretions.
This gives a practical edge to any hot drink when congestion is your main complaint. Tea, broth, hot water with lemon, even just a mug of heated water with nothing added will get some steam into your nasal passages. The key is sipping rather than gulping, and holding the mug close enough to breathe in the vapor.
Chicken Soup Does More Than Warm You Up
Grandma’s chicken soup has actual lab evidence behind it. Beyond the mucus-clearing effect of hot liquid, chicken soup appears to have a mild anti-inflammatory property. In a laboratory study, chicken soup inhibited the movement of neutrophils, which are white blood cells that rush to infection sites and drive much of the inflammation responsible for cold symptoms like congestion and sore throat. The inhibition was concentration-dependent, meaning stronger soup had a bigger effect.3PubMed. Chicken soup inhibits neutrophil chemotaxis in vitro Researchers suggested this could help explain why chicken soup seems to ease upper respiratory symptoms beyond what plain hot water does.
It’s worth noting that this was an in-vitro experiment, meaning it happened in a dish rather than inside a living person. Whether a bowl of soup produces the same anti-inflammatory effect in your body hasn’t been proven in a clinical trial. Still, chicken soup delivers fluid, warmth, sodium, and some calories at a time when you may not feel like eating much else. Even setting the immune angle aside, it checks nearly every box a sick body needs.
Honey in Warm Drinks
Adding a spoonful of honey to warm tea or water is one of the oldest cough remedies, and the evidence is surprisingly supportive, especially for children. When children with upper respiratory infections were given honey before bedtime, cough frequency and severity dropped more than with a placebo. Honey performed about as well as the common over-the-counter cough suppressant dextromethorphan and better than diphenhydramine or no treatment at all.4PubMed Central. Honey for treatment of cough in children That’s a meaningful finding given that most pediatric cough medicines don’t have strong evidence supporting their use in young children.
For adults, the mechanism is thought to involve honey coating and soothing irritated throat tissue, plus triggering salivation that helps with the urge to cough. Mixed into warm water or tea, honey also adds a small amount of glucose for energy when appetite is low. Darker honeys tend to have higher antioxidant content, though any variety should work for cough relief.
One critical exception: honey should never be given to infants under one year old. Honey is the most well-known dietary risk factor for infant botulism because it can harbor Clostridium botulinum spores.5PubMed Central. Infant Botulism: In Search of Clostridium botulinum Spores An older child’s or adult’s digestive system handles these spores without trouble, but an infant’s immature gut cannot. Health officials consistently advise against honey for babies regardless of the type or brand.6European Journal of Integrative Medicine. Perceived risks and benefits of the use of honey for infants
Ginger Tea for Nausea and Stomach Bugs
When the problem isn’t in your nose but in your stomach, ginger tea is worth reaching for. Ginger has a measurable effect on how quickly the stomach empties. In a study of healthy volunteers, ginger roughly halved gastric emptying time compared with a placebo, bringing it from about 27 minutes down to 13, while also increasing the contractions that move food along.7PubMed. Effects of ginger on gastric emptying and motility in healthy humans Faster gastric emptying can ease that heavy, nauseated feeling that comes with stomach flu or food poisoning.
You can make ginger tea by steeping sliced fresh ginger in hot water for five to ten minutes. Commercial ginger teas work too, though the ginger concentration varies widely between brands. If you’re dealing with active vomiting, small sips are better than large gulps. And because ginger tea is essentially just water with a flavoring agent, it contributes to hydration without adding much sugar or anything else that might upset a sensitive stomach.
Peppermint Tea for Digestive Discomfort
Peppermint works through a different mechanism than ginger. The menthol in peppermint oil acts as a smooth muscle relaxant, calming the involuntary contractions of the digestive tract. Research has shown that menthol blocks calcium channels in intestinal smooth muscle, which is the same basic mechanism by which some prescription antispasmodic drugs work.8PubMed Central. Review article: The physiologic effects and safety of Peppermint Oil and its efficacy in irritable bowel syndrome and other functional disorders This makes peppermint tea a reasonable choice when you’re dealing with cramping or bloating alongside illness.
Peppermint tea also carries the steam benefits of any hot drink, so it can pull double duty if you have both a stuffy nose and an uneasy stomach. One thing to keep in mind: if acid reflux is part of your symptoms, peppermint can relax the lower esophageal sphincter and make heartburn worse. In that case, ginger or plain chamomile may be a better bet.
Electrolyte Drinks and Coconut Water
For illnesses involving significant fluid loss, such as a stomach virus with vomiting and diarrhea, electrolyte replacement becomes genuinely important rather than just nice to have. Commercial oral rehydration solutions are formulated for exactly this scenario, with precise ratios of sodium, potassium, and glucose. Sports drinks contain electrolytes too, though usually with more sugar and less sodium than an ORS.
Coconut water has gained popularity as a natural alternative, and the evidence suggests it holds up. In a study comparing coconut water, a commercial sports drink, and flavored water for rehydration, subjects who drank coconut water retained significantly more fluid than those who drank flavored water. Coconut water performed equally well as the commercial sports drink for overall rehydration status, despite having lower sodium, because it’s naturally high in potassium.9PubMed. Rehydration After Exercise-Induced Fluid Losses: Comparing Flavored Water, Coconut Water, and Carbohydrate-Electrolyte Sports Beverage A separate study in athletes found that coconut water produced a greater increase in urine pH compared with a commercial isotonic drink, suggesting potentially better acid-base recovery.10JAND: Journal of Applied Nutrition and Dietetic. Effect of giving young coconut water and isotonic drinks on the recovery of dehydration status after training in pencak silat athletes
If you find coconut water palatable while sick, it’s a reasonable way to get both fluid and potassium. For severe dehydration, though, particularly in young children or the elderly, a proper ORS with adequate sodium remains the gold standard.
Vitamin C and Fruit Juice
Orange juice is many people’s first instinct when they get sick, and it does provide vitamin C. A meta-analysis looking at vitamin C supplementation and the common cold found that the benefit was most apparent in people who normally had low intake of fruit juices, which are a major daily source of the vitamin.11PubMed Central. Vitamin C reduces the severity of common colds: a meta-analysis In other words, if you already eat plenty of fruits and vegetables, loading up on orange juice during a cold probably won’t shorten it much. But if your diet is typically low in vitamin C, getting more of it when you’re ill could help reduce the severity of symptoms.
The catch with fruit juice is the sugar content. A glass of orange juice can contain as much sugar as a soda, and high sugar intake may worsen diarrhea in some people, especially children. Diluting juice with water, or simply eating an orange and drinking water separately, can give you the vitamin C without the sugar load. Whole fruits also provide fiber that juice strips out.
Fermented Drinks for Recovery
If your illness involved antibiotics or significant gut disruption, fermented drinks like kefir may help rebuild the microbial community in your digestive tract. Kefir contains a diverse set of live bacterial strains and bioactive compounds that can modulate gut microbiota composition and reduce low-grade inflammation.12PubMed Central. Kefir and Intestinal Microbiota Modulation: Implications in Human Health This isn’t a drink you need during the acute phase of a stomach bug, when your gut is too inflamed to process much of anything. It’s more useful in the days after you start feeling better, when your digestive system is resettling.
Kombucha is another fermented option, though it’s generally less well-studied than kefir and its probiotic content varies enormously by brand and brewing method. Both drinks are acidic, so if your throat is raw or your stomach is still tender, you might want to wait a day or two before introducing them.
The Milk and Mucus Myth
A persistent folk belief holds that drinking milk while sick increases mucus production and makes congestion worse. This has been tested directly. In a study where adults were infected with a rhinovirus and then tracked for their dairy intake and nasal secretion output, milk consumption had no association with increased mucus production in either the upper or lower respiratory tract. People who believed the “milk makes mucus” claim did report feeling more congested, but when researchers actually weighed their nasal secretions, they weren’t producing any more than the non-believers.13PubMed. Relationship between milk intake and mucus production in adult volunteers challenged with rhinovirus-2
So if milk, warm cocoa, or a smoothie sounds appealing when you’re sick, there’s no physiological reason to avoid them. The thick mouthfeel of milk can create a temporary sensation of coating in the throat, which some people interpret as more mucus, but it doesn’t translate into actually producing more. If you’re someone who finds dairy hard to digest under normal circumstances, illness probably isn’t the time to push it. Otherwise, dairy is fine.
Drinks to Limit or Skip
Alcohol is the clearest drink to avoid when you’re fighting an infection. Chronic heavy drinking weakens the immune system by reducing the number of circulating lymphocytes and increasing vulnerability to both bacterial and viral infections.14PubMed Central. Opposing effects of alcohol on the immune system Even a few drinks during an acute illness can worsen dehydration and interfere with sleep quality, both of which slow recovery. The old “hot toddy” remedy might feel soothing going down, but the alcohol isn’t doing your immune system any favors.
Caffeine is more nuanced. A cup of tea or coffee is fine for most sick adults, and the warmth and steam provide the same nasal benefits as any hot drink. The concern is timing: caffeine consumed later in the day can significantly disrupt sleep. Research has shown that caffeine reduces total sleep time by about 30 minutes and cuts deep sleep even more, while also increasing awakenings during the night.15PubMed Central. Caffeine Intake Alters Recovery Sleep after Sleep Deprivation Since restorative sleep is one of the most powerful tools your body has for fighting infection, a morning coffee is unlikely to cause problems, but an afternoon or evening cup could undermine recovery in ways that offset whatever comfort it brings.
Sugary sodas and energy drinks are also best avoided. They provide fluid but deliver a large sugar load without meaningful nutrients, and they can worsen diarrhea through osmotic effects in the gut. If you want something carbonated, plain sparkling water or lightly flavored seltzer is a better option.
Hot Versus Cold Drinks for a Sore Throat
People are split on whether a sore throat feels better with hot drinks or cold ones, and both approaches have some logic behind them. Hot liquids promote blood flow to the throat tissue and, as noted earlier, generate steam that helps with accompanying congestion. Cold liquids or ice chips, on the other hand, have a mild numbing effect that can temporarily dull pain. Research on cold therapy applied to the throat area has shown reduced soreness in the short term, with a measurable effect appearing within minutes.16Bratislava Medical Journal. Impact of Cold Throat Packs on Postoperative Sore Throat and Nausea-Vomiting
The honest answer is that personal preference matters more than any rule here. If warm tea with honey feels soothing, drink that. If sucking on ice chips or sipping cold water brings relief, go with it. Both deliver fluid, and that’s the priority. The one thing to avoid is extremely hot liquid that could further irritate already-inflamed tissue.
What About Echinacea Tea?
Echinacea tea and supplements are among the most popular herbal remedies for colds. The evidence is mixed. A Cochrane review that pooled data from 24 double-blind trials with over 4,600 participants found that none of the prevention trials showed a statistically significant reduction in the number of people who caught a cold. When results were pooled after the fact, there was a suggestion of a modest risk reduction, but it wasn’t strong enough to be conclusive. For treatment, only two out of six trials found that echinacea shortened cold duration compared with a placebo.17PubMed Central. Echinacea for preventing and treating the common cold
Part of the problem is that “echinacea” isn’t one thing. Different species, plant parts, and preparation methods produce very different products, making it hard to compare studies or draw firm conclusions. An echinacea tea bag from a grocery store shelf may contain very little of the active compounds used in the clinical trials that did show benefit. If you enjoy the taste, it’s harmless and still delivers hot water and steam. But the expectation that it will meaningfully shorten your cold should be modest.
Salt Water Gargling
Gargling with warm salt water is a time-honored sore-throat remedy, and it does help with local symptom relief by drawing fluid out of swollen tissue through osmosis. However, its ability to fight the infection itself appears limited. A laboratory study testing various gargle formulations against SARS-CoV-2 found that salt water did not produce a significant reduction in viral load.18PubMed Central. The effectiveness of various gargle formulations and salt water against SARS-CoV-2 So while gargling may temporarily ease throat pain, don’t count on it to clear the infection or reduce how contagious you are.
The usual recipe is about half a teaspoon of salt dissolved in a cup of warm water. Gargle for 15 to 30 seconds and spit. You can repeat this several times a day. It’s safe, nearly free, and compatible with any of the drinks listed above. Just don’t swallow large amounts of the salt water, as the sodium content would be counterproductive for hydration.
Practical Pairings by Symptom
Choosing what to drink when you’re sick doesn’t have to be complicated. For a head cold with congestion, hot tea or broth sipped slowly will do the most good. For a cough, warm water or tea with honey is as effective as most over-the-counter options. For nausea and stomach upset, ginger tea in small sips gives relief without adding much to an unhappy stomach. For dehydration from vomiting or diarrhea, an oral rehydration solution or coconut water replaces what plain water can’t. And for a sore throat, go with whatever temperature feels better, hot or cold, and consider adding honey if coughing is involved.
You can also layer these throughout the day. A morning coffee is fine if you’re used to it and keep it to one cup. Mid-morning might be ginger tea if your stomach is off. Broth or chicken soup at lunch covers fluid, sodium, and some calories. Herbal tea with honey in the afternoon handles the cough. And plenty of water in between ties it all together. The variety itself can be motivating when you don’t feel like consuming much of anything, which is half the battle when you’re sick.