When you’re sick, your body needs fluids above all else, followed by easy-to-digest foods that deliver calories and nutrients without making symptoms worse. What you should reach for depends on what kind of sick you are: a cold with a sore throat calls for different foods than a stomach bug with nausea and diarrhea. Here’s a practical breakdown by symptom.
Fluids Come First, No Matter What
Fever, vomiting, and diarrhea all pull water out of your body fast. Most adults with mild to moderate dehydration can recover just by drinking more fluids, but plain water isn’t always the best choice. When you’re losing fluids through vomiting or diarrhea, you’re also losing sodium, potassium, and other electrolytes. Water with added electrolytes helps your body absorb and retain fluid more effectively than water alone.
Good options include diluted sports drinks (mixed half and half with water), broth, coconut water, or oral rehydration solutions. Full-strength fruit juice and regular soda can actually make diarrhea worse because of their high sugar content. If you’re barely keeping anything down, start small. Even a teaspoon every few minutes adds up and gives your stomach time to adjust before you increase the volume.
Chicken Soup Really Does Help
Chicken soup’s reputation as a cold remedy has actual science behind it. A study published in the journal Chest tested a traditional chicken soup recipe and found it reduced the movement of certain white blood cells that drive inflammation in the upper respiratory tract. That inflammatory response is what causes much of the congestion, swelling, and misery of a cold. The effect was concentration-dependent, meaning the heartier the soup, the stronger the benefit. Both the chicken and the vegetables in the recipe contributed individually.
Beyond its anti-inflammatory properties, soup delivers hydration, sodium, protein, and calories in a form that’s easy to eat when you have no appetite. The warm steam also loosens nasal congestion temporarily. If you don’t have homemade soup available, even store-bought versions offer the fluid and electrolyte benefits.
Honey for Coughs and Sore Throats
If a persistent cough is keeping you up at night, honey is one of the more effective remedies available. A clinical trial in 105 children with upper respiratory infections found that a single dose of buckwheat honey before bedtime reduced cough severity by about 47%, compared to roughly 25% with no treatment. Honey performed just as well as a standard over-the-counter cough suppressant, with no significant difference between the two.
A spoonful of honey on its own works, or you can stir it into warm tea or warm water with lemon. The thick, coating texture soothes an irritated throat on contact. One important note: honey should never be given to children under one year old due to the risk of infant botulism.
What to Eat With Nausea or a Stomach Bug
You may have heard of the BRAT diet (bananas, rice, applesauce, toast) as the go-to for stomach troubles. Current guidelines from the National Institute of Diabetes and Digestive and Kidney Diseases don’t actually recommend following a restricted diet when you have acute diarrhea. Most experts now say that once you feel ready to eat, you can return to your normal diet. Children should continue eating their usual age-appropriate foods, and infants should keep getting breast milk or formula.
That said, bland, low-fiber foods are simply easier to tolerate when your stomach is upset. Plain crackers, white rice, bananas, and broth are gentle starting points. The key is not to force yourself to eat before you’re ready, and not to limit yourself unnecessarily once your appetite returns. Your body needs the calories and nutrients to recover.
Ginger is a well-studied option for managing nausea specifically. Research reviewed by the American Academy of Family Physicians found that doses between 975 and 1,500 milligrams per day were effective. Practically, that translates to ginger tea made from fresh ginger root, ginger chews, or ginger ale made with real ginger (check the label, since many brands use only flavoring).
Vitamin C Has a Modest Role
Loading up on orange juice when you’re sick is a deeply ingrained habit, and vitamin C does play a role in immune function. Most cold studies have used a daily dose of about 200 milligrams, which you can get from a couple of oranges, a cup of strawberries, or a bell pepper. The upper safe limit is 2,000 milligrams per day, so megadosing isn’t necessary and can cause digestive upset. Vitamin C won’t dramatically shorten your cold, but maintaining adequate intake supports your immune system while it fights off the infection.
Dairy Doesn’t Make Congestion Worse
Many people skip milk, yogurt, and cheese when they have a cold because they believe dairy increases mucus production. This is a myth. Drinking milk does not cause your body to make more phlegm. What actually happens is that milk and saliva mix to create a slightly thick coating in your mouth and throat, which feels like extra mucus but isn’t. Studies have found no difference in respiratory symptoms whether people consumed dairy or non-dairy alternatives.
This matters because yogurt and kefir are some of the easiest foods to eat when you’re sick, and they deliver protein, calories, and beneficial bacteria. If dairy is one of the few things that sounds appealing, there’s no reason to avoid it.
Rebuilding Your Gut After Antibiotics
If your illness required antibiotics, your gut bacteria took a hit along with the infection. Antibiotics don’t distinguish between harmful bacteria and the beneficial ones that support digestion and immunity. Fermented foods can help repopulate your gut with helpful microbes during and after a course of treatment.
The best dietary sources of probiotics include yogurt (look for “live and active cultures” on the label), kefir, sauerkraut, kimchi, miso, tempeh, kombucha, and fermented pickles made with salt rather than vinegar. Even sourdough bread and certain cheeses like gouda, cheddar, and mozzarella contain probiotic strains. You don’t need to eat all of these. Adding one or two servings of fermented food per day in the weeks following antibiotics gives your gut a meaningful head start on recovery.
Foods That Can Make Things Worse
Some foods are harder for your body to process when it’s already under stress. Fried and greasy foods slow digestion and can worsen nausea. Very spicy foods may irritate an already sensitive stomach or inflamed throat. Alcohol dehydrates you further and suppresses immune function. Caffeine in large amounts also acts as a mild diuretic, though a single cup of tea or coffee is unlikely to cause problems if you’re otherwise staying hydrated.
High-sugar foods and drinks deserve special mention. Full-strength juice and soda can pull water into the intestines and make diarrhea worse. If juice is the only thing that appeals to you, dilute it with equal parts water.
A Simple Framework
- Cold or flu with congestion: Chicken soup, warm broth, tea with honey, citrus fruits, and plenty of fluids.
- Sore throat or cough: Honey (straight or in tea), warm broths, soft foods like yogurt or mashed potatoes, and cold foods like popsicles or smoothies to numb throat pain.
- Nausea or vomiting: Small sips of electrolyte water first, then bland foods like crackers, rice, and bananas as tolerated. Ginger tea or ginger chews for active nausea.
- Diarrhea: Electrolyte-rich fluids, and a return to normal eating as soon as your appetite allows. Avoid full-strength juice and soda.
- After antibiotics: Fermented foods like yogurt, kefir, sauerkraut, or kimchi to support gut recovery.
The overarching principle is simple: stay hydrated, eat what you can tolerate, and don’t restrict your diet more than your symptoms require. Your body burns extra calories fighting infection, so giving it fuel, even in small amounts, helps you recover faster.