When you’re sick, the best things to reach for are fluids with electrolytes, broth-based soups, and simple whole foods that deliver protein and nutrients without upsetting your stomach. The old advice to “starve a fever” is outdated. Your body needs fuel and hydration to mount an immune response and recover, even if your appetite is low.
Fluids Come First
Dehydration is the most common complication of everyday illnesses like colds, flu, and stomach bugs, especially when fever, vomiting, or diarrhea are pulling water out of your body faster than usual. The general daily recommendation is about 15 cups for men and 11 cups for women, but you’ll likely need more when you’re running a fever or losing fluids through sweat and diarrhea.
Water is fine, but drinks containing electrolytes (sodium, potassium, and a small amount of sugar) help your body absorb and retain fluid more effectively. Oral rehydration solutions, coconut water, and electrolyte powders mixed into water all work well. Broth and clear soups count too, and the salt content naturally provides electrolytes.
If you’re dealing with nausea or vomiting, don’t gulp large amounts at once. Take small sips of about one ounce every three to five minutes. This slow approach lets your stomach absorb fluid without triggering more vomiting. Warm liquids like herbal tea or broth can also help loosen nasal congestion and soothe a sore throat at the same time.
Best Foods for an Upset Stomach
The classic BRAT diet (bananas, rice, applesauce, toast) is a fine starting point for the first day or two of a stomach illness, but Harvard Health notes there’s no reason to limit yourself to just those four foods. A broader range of bland, easy-to-digest options actually gives your body more of the nutrients it needs to recover.
Good choices include:
- Brothy soups (chicken soup is the cliché for a reason: warm liquid, salt, and easy protein)
- Oatmeal (gentle on the stomach and provides sustained energy)
- Boiled or baked potatoes (a good source of potassium, which you lose through vomiting and diarrhea)
- Crackers and plain toast (easy to keep down when nothing else sounds appealing)
- Cooked carrots, squash, or sweet potatoes (soft, nutrient-dense, and mild in flavor)
- Eggs (one of the easiest proteins to digest)
- Skinless chicken or turkey (lean protein without heavy fat)
Once your stomach settles, gradually reintroduce more varied foods. Avocado, fish, and cooked vegetables are all good next steps. The goal is to move past plain starches and get protein and micronutrients back into your diet as soon as your body tolerates them.
Why Protein Matters During Illness
Your immune system runs on protein. Antibodies, the molecules your body produces to fight infection, are made from amino acids. When you eat very little protein while sick, your body starts breaking down muscle tissue to get what it needs, which is why people often feel weak after even a short illness. The baseline recommendation is at least 0.8 grams of protein per kilogram of body weight daily. For a 150-pound person, that’s roughly 55 grams per day. Even small amounts of chicken, eggs, yogurt, or protein-rich broth throughout the day help prevent muscle loss and support recovery.
Honey, Ginger, and Other Natural Helpers
Honey is one of the most effective home remedies for cough and sore throat. For children ages 1 and older, half a teaspoon to one teaspoon can be given straight or mixed into warm water or tea. Adults can use the same approach with a full tablespoon. Honey coats the throat, reduces irritation, and has performed as well as some over-the-counter cough suppressants in studies. Never give honey to a child under age 1 due to the risk of infant botulism.
Ginger is genuinely effective for nausea. Clinical trials have used doses ranging from about 250 mg to 500 mg of ginger powder taken several times a day. In practical terms, that translates to a thumb-sized piece of fresh ginger steeped in hot water as tea, or ginger chews and ginger ale made with real ginger (many commercial ginger ales use only flavoring, so check the label).
Supplements: What Actually Helps
Vitamin C gets the most attention, but the evidence is more nuanced than most people realize. Taking at least 200 mg of vitamin C daily can reduce how often you get sick if you’re under heavy physical stress, like intense exercise or cold-weather exposure. In studies of marathon runners and soldiers, daily doses between 250 mg and 1,000 mg cut cold frequency in half. However, once cold symptoms have already started, vitamin C does not shorten the illness or reduce severity. It’s a prevention tool, not a treatment. The upper safe limit for adults is 2,000 mg per day; higher doses cause diarrhea and stomach cramps.
Zinc lozenges are widely marketed for colds, but the evidence remains unclear. The Mayo Clinic notes that researchers still haven’t identified the best dose or timing for zinc to reliably reduce cold duration. The upper safe limit for adults is 40 mg per day. If you choose to try zinc lozenges, starting them within the first 24 hours of symptoms gives you the best chance of any benefit.
Clearing Congestion at Home
Keeping your indoor humidity between 30% and 50% helps relieve nasal and chest congestion without creating conditions for mold growth. A cool-mist humidifier in your bedroom while you sleep can make a noticeable difference, especially in winter when indoor air tends to be dry. Clean your humidifier regularly to prevent bacteria from building up in the water tank.
Saline nasal rinses (using a neti pot or squeeze bottle) flush mucus and irritants from your nasal passages. The CDC recommends using only distilled water, sterile water, or tap water that has been boiled for at least one minute and then cooled. Never use untreated tap water for nasal rinsing, as it can introduce dangerous organisms directly into your sinuses.
Warning Signs That Need Medical Attention
Most colds, flus, and stomach bugs resolve on their own within a week or so. But a fever above 104°F (40°C) warrants a call to your doctor. Seek immediate medical help if a fever comes with confusion, stiff neck, trouble breathing, seizures, loss of consciousness, or severe pain anywhere in the body. Persistent vomiting that prevents you from keeping any fluids down for more than 24 hours also needs professional evaluation, since dehydration can escalate quickly.