When you’re sick, your body needs fluids above all else, followed by easy-to-digest foods that provide enough calories and nutrients to support recovery without upsetting your stomach. The specific foods that help most depend on your symptoms, whether you’re dealing with a cold, a sore throat, nausea, or a stomach bug. Here’s what actually works and why.
Fluids Come First
Fever, sweating, vomiting, and diarrhea all pull water out of your body faster than normal. For every degree of fever above 100.4°F, your body loses roughly 10% more fluid through the skin than it would otherwise. That adds up quickly, especially if you’re also not eating or drinking much because you feel lousy.
Water is fine for mild illnesses, but if you’re dealing with vomiting or diarrhea, plain water doesn’t replace the sodium and potassium you’re losing. A proper oral rehydration solution contains about three times the sodium of a typical sports drink (roughly 60 millimoles per liter versus 18). Sports drinks work in a pinch, but they’re designed for sweat loss during exercise, not for gut-related fluid loss. If you can’t find an oral rehydration solution at your pharmacy, you can make a basic version with water, salt, and a small amount of sugar.
Broth-based soups pull double duty here. They deliver fluid and sodium together in a form that’s warm and easy to sip, even when nothing else sounds appealing.
Why Chicken Soup Actually Helps
Chicken soup isn’t just comfort food. Lab research published in the journal CHEST found that chicken soup significantly slowed the movement of white blood cells called neutrophils, and did so in a dose-dependent way. Neutrophils are the immune cells that rush to infected tissue and cause much of the inflammation behind cold symptoms like congestion, sore throat, and body aches. A mild anti-inflammatory effect from the soup could help ease those symptoms.
Both the chicken and the vegetables in the soup showed this activity individually, but the complete soup was the most effective combination. The warm liquid also helps loosen nasal mucus, and the salt content supports hydration. It’s one of the rare cases where a folk remedy holds up under scientific scrutiny.
Best Foods for an Upset Stomach
The classic BRAT diet (bananas, rice, applesauce, toast) has been recommended for decades, but it’s more limited than it needs to be. Harvard Health notes there are no studies comparing the BRAT diet to other bland options, and restricting yourself to just those four foods for more than a day or two means missing out on protein and other nutrients your body needs to recover.
A better approach: start with bland, easy-to-digest foods and expand as your stomach settles. Good options in the first day or two include:
- Brothy soups for fluids and sodium
- Plain oatmeal for gentle fiber and calories
- Boiled potatoes or sweet potatoes (without skin) for starch and potassium
- Crackers or dry cereal (unsweetened) for something easy to nibble
- Bananas for potassium and natural sugars
Once you can keep those down without trouble, add cooked carrots, butternut squash, avocado, skinless chicken or turkey, fish, and eggs. These are still bland enough to be gentle on your gut, but they provide the protein and micronutrients that four foods alone can’t deliver.
Ginger for Nausea
If nausea is your main problem, ginger is one of the most studied natural remedies available. A systematic review of clinical trials found that taking around 1 gram of ginger per day for at least three days reduced acute vomiting by about 70% compared to placebo. That’s roughly half a teaspoon of ground ginger, the amount you’d get in a strong cup of ginger tea or a few slices of fresh ginger steeped in hot water.
Ginger chews, ginger ale made with real ginger (check the label, many brands use artificial flavoring), and crystallized ginger are all reasonable ways to get it in. If your stomach is too upset for anything solid, sipping ginger tea slowly is the gentlest route.
Honey for a Sore Throat and Cough
A spoonful of honey before bed can suppress nighttime coughing about as well as standard over-the-counter cough suppressants. Research published through the American Academy of Family Physicians found that buckwheat honey was equivalent to dextromethorphan (the active ingredient in most cough syrups) for reducing cough severity and improving sleep in children with upper respiratory infections.
For adults, one to two teaspoons taken 30 minutes before bedtime is a reasonable dose based on the study protocols. Stir it into warm water or herbal tea if you prefer. One critical note: never give honey to a child under 12 months old due to the risk of botulism.
Zinc Lozenges at the First Sign of a Cold
If you catch a cold early, zinc lozenges can shorten how long it lasts. A meta-analysis of individual patient data found that dissolving zinc acetate lozenges throughout the day, totaling 80 to 92 milligrams of elemental zinc, improved recovery rates. The key is starting within 24 hours of the first symptoms and dissolving one lozenge every two to three hours while awake.
Look for lozenges that list the amount of elemental zinc on the label and stay under 100 milligrams per day. Zinc lozenges can leave a metallic taste and occasionally cause mild nausea, but serious side effects are rare at these doses. This only works for colds, not for flu or stomach bugs.
Foods You Don’t Need to Avoid
One of the most persistent myths about eating while sick is that dairy increases mucus production. It doesn’t. The Mayo Clinic states plainly that drinking milk does not cause the body to make phlegm. What actually happens is that milk and saliva mix to create a slightly thick coating in the mouth and throat, which some people mistake for extra mucus. Studies going back to 1948 have found no difference in mucus levels between people who drink milk and those who don’t. Research in children with asthma, a group often told to avoid dairy when congested, found no difference in symptoms between those drinking cow’s milk and those drinking soy milk.
This means yogurt, which contains beneficial bacteria that support gut health, is perfectly fine to eat when you’re sick. The same goes for milk-based smoothies if that’s the easiest way for you to get calories and protein down.
What to Eat With Different Symptoms
Your symptoms should guide your choices. With a cold or sinus congestion, warm liquids like chicken soup, hot tea with honey, and broth help loosen mucus and soothe irritated airways. Zinc lozenges started early may cut your cold short by a day or more.
With a stomach bug, start with clear fluids and oral rehydration, then move to bland starches as your appetite returns. Ginger tea can help with persistent nausea. Avoid greasy, spicy, or heavily seasoned foods until your gut has settled for at least 24 hours.
With a fever, prioritize fluids and don’t force yourself to eat large meals. Small, frequent snacks of easily digestible foods, a few crackers here, half a banana there, are easier on your body than trying to sit down for a full plate. Your appetite will return as the fever breaks, and you can gradually increase portion sizes from there.