When you’re sick, your body burns through energy and fluids faster than normal. For every degree of fever, your metabolic rate rises roughly 8 to 10 percent, meaning your body needs more calories, more water, and more nutrients just to keep up with the fight. The right foods can ease symptoms, speed recovery, and keep you from getting weaker. The wrong ones can make nausea, congestion, or stomach trouble worse.
What you should eat depends partly on what kind of sick you are. A cold, a stomach bug, and a course of antibiotics each call for slightly different strategies. Here’s what actually helps.
Fluids Come First
Hydration matters more than food when you’re ill. Fever, sweating, vomiting, and diarrhea all drain fluids fast, and even mild dehydration can make fatigue and headaches worse. The general daily target is about 15 cups for men and 11 cups for women under normal conditions. When you’re sick, you likely need more.
Water is fine, but drinks with electrolytes (a mix of salt and sugar) help your body absorb and retain fluid more effectively. Sports drinks, coconut water, or electrolyte powders mixed into water all work. Broth counts too and has the added benefit of providing sodium.
If you’re vomiting, don’t gulp large amounts at once. Take small sips of about one ounce every three to five minutes. This slow approach rehydrates you without overwhelming your stomach and triggering more nausea.
Chicken Soup Is More Than Comfort Food
Chicken soup has genuine benefits beyond tradition. A well-known lab study published in the journal CHEST found that chicken soup significantly slowed the movement of certain white blood cells called neutrophils. When neutrophils rush to the site of an infection, they contribute to the inflammation that causes congestion, sore throat, and that general “stuffed up” misery. By calming that inflammatory response, soup may help reduce upper respiratory symptoms.
The researchers tested the individual ingredients and found that the vegetables, the chicken, and the broth all contributed to this effect. The warm liquid itself also stimulates nasal clearance, helping loosen mucus so you can breathe more easily. A bowl of chicken soup gives you fluids, electrolytes from the salt, protein from the chicken, and easy-to-digest carbohydrates if you add noodles or rice. It’s one of the most complete sick-day foods you can eat.
What to Eat With a Cold or Flu
When you have a respiratory illness, the goals are staying hydrated, keeping your energy up, and soothing irritated airways. Good choices include:
- Warm broth or soup for hydration and congestion relief
- Honey (a half to one teaspoon) to calm a cough. Clinical trials have found it works about as well as common over-the-counter cough suppressants. Never give honey to children under one year old.
- Warm tea with lemon for sore throat relief and gentle hydration
- Oatmeal for easy calories and fiber without upsetting your stomach
- Scrambled eggs for protein that’s soft and easy to swallow
For sore throats specifically, both cold and warm foods provide relief through different mechanisms. Ice popsicles numb inflamed tissue, while warm tea or broth soothes it. Alternate based on what feels better in the moment. Avoid rough, scratchy foods like chips or dry toast that can irritate a raw throat.
What to Eat With a Stomach Bug
When nausea, vomiting, or diarrhea are your main symptoms, the priority shifts to keeping food down and replacing lost fluids. The classic BRAT diet (bananas, rice, applesauce, toast) is a reasonable starting point for the first day or two, but Harvard Health notes there’s no research proving it’s better than a broader bland diet. Restricting yourself to just those four foods for more than a day or two can leave you short on the protein and nutrients your body needs to recover.
Once your stomach starts to settle, expand to other gentle foods: boiled potatoes, crackers, unsweetened dry cereal, and brothy soups. As you improve, add more nutritious options like cooked squash, carrots, avocado, skinless chicken or turkey, fish, and eggs. These are all bland enough to be easy on your digestive system while providing real nutritional support.
Ginger for Nausea
Ginger is one of the best-studied natural remedies for nausea. Clinical trials have tested it across a range of situations, from pregnancy-related nausea to post-surgery queasiness. A meta-analysis of six randomized trials found that about 1 gram per day of ginger for at least four days significantly reduced nausea and vomiting compared to placebo. You can get this through ginger tea, fresh ginger sliced into hot water, or ginger chews. Higher doses (above 1.5 grams daily) don’t appear to work better than moderate ones.
Foods to Avoid When You’re Sick
Some foods make symptoms worse or are simply harder for your body to handle while it’s fighting an infection. Greasy, fried, or very spicy foods can aggravate nausea and are harder to digest. Sugary drinks and candy provide empty calories without the electrolytes or nutrients you need. Alcohol dehydrates you further and suppresses immune function. Caffeine in large amounts can also contribute to dehydration, though a small cup of tea is generally fine.
One thing you don’t need to avoid: dairy. The old belief that milk increases mucus production is a myth. Research from the Mayo Clinic confirms that drinking milk does not cause your body to produce more phlegm. What actually happens is that milk and saliva mix to form a slightly thick coating in your mouth and throat, which some people mistake for extra mucus. If yogurt, milk, or cheese sound appealing and your stomach can handle them, they’re perfectly fine to eat while sick.
Eating During or After Antibiotics
If your illness requires antibiotics, what you eat can make a real difference in how your gut handles the medication. Antibiotics kill both harmful and beneficial bacteria in your digestive tract, which is why diarrhea is such a common side effect.
Probiotics can help prevent this. The strains with the strongest evidence are Lactobacillus rhamnosus GG and Saccharomyces boulardii (a yeast related to the one used in brewing). Doses of 5 to 40 billion colony-forming units per day showed the best results in clinical trials, though lower doses were also effective. You can find these in supplement form or in fermented foods like yogurt with live cultures, kefir, and kimchi. Start the probiotics when you begin the antibiotic course and continue for at least a few days after finishing.
When You Have No Appetite
Loss of appetite is one of the body’s normal responses to infection. You don’t need to force yourself to eat full meals, but going days without any calories will slow your recovery. Your body is burning extra energy to mount an immune response and repair tissue, so even small amounts of food matter.
Focus on calorie-dense, easy options: a few spoonfuls of nut butter, a banana, a small bowl of oatmeal, a cup of broth. Eating small amounts frequently is easier on a queasy stomach than sitting down for a large meal. If solid food sounds unbearable, smoothies made with fruit, yogurt, and a splash of honey can deliver calories and nutrients in liquid form.