The best foods to eat when you’re sick depend on your symptoms, but the general principle is simple: prioritize fluids, easy-to-digest calories, and foods that actively reduce inflammation. Your body burns more energy fighting an infection than it does on a normal day, so eating enough matters even when your appetite disappears. Here’s what actually helps, broken down by what you’re dealing with.
Chicken Soup Does More Than Comfort You
Chicken soup has a real biological effect beyond warmth and nostalgia. A study published in the journal CHEST found that chicken soup significantly inhibited the movement of white blood cells called neutrophils in a concentration-dependent manner. Neutrophils are immune cells that rush to infection sites and drive the inflammation behind congestion, sore throat, and that overall “heavy” feeling. By slowing their migration, chicken soup produces a mild anti-inflammatory effect that can ease upper respiratory symptoms.
The researchers tested individual ingredients and found that all the vegetables in the soup, along with the chicken itself, had some inhibitory activity on their own. But the complete soup worked without damaging cells, making it both effective and gentle. The active component was in the broth itself, not in any solid particles, which means even sipping the liquid portion helps. Homemade versions with onions, carrots, celery, and chicken tend to perform best, but store-bought broth still delivers warmth, sodium, and fluids when you can’t cook.
Hydration Is the Single Most Important Thing
Fever, sweating, vomiting, and diarrhea all drain fluids and electrolytes fast. Water alone doesn’t always cut it because you’re also losing sodium and potassium. If plain water is all you can manage, drink it. But adding electrolytes speeds recovery noticeably.
You can make a simple rehydration drink at home using a recipe from Harvard’s School of Public Health: combine 3½ cups of water, half a teaspoon of salt, 2 to 3 tablespoons of honey or sugar, and 4 ounces of unsweetened orange juice or coconut water. This gives you a balance of sodium, potassium, and glucose that helps your intestines absorb fluid more efficiently than water alone. Commercial electrolyte drinks work too, but many contain unnecessary added sugars or artificial flavors, so check the label.
Coconut water, diluted fruit juice, and clear broths all count toward your fluid intake. If you’re running a fever, aim to drink more than you think you need. A good rule of thumb: if your urine is dark yellow, you’re behind.
Honey for a Stubborn Cough
Honey coats the throat and has genuine cough-suppressing properties. For children ages 1 and older, half a teaspoon to one teaspoon (2.5 to 5 milliliters) can treat a cough effectively. Adults can take a tablespoon straight or stir it into warm tea or lemon water. The thick texture soothes irritated tissue, and honey has mild antimicrobial properties that may help locally.
One critical safety note: never give honey to a child younger than 1 year old. Their digestive systems can’t handle the spores of a bacterium that causes infant botulism, a rare but serious form of food poisoning.
What to Eat With Nausea or Stomach Symptoms
When your stomach is the problem, the goal shifts from nutrition to tolerance. The BRAT diet (bananas, white rice, applesauce, white toast) remains a useful short-term strategy. These foods are low in fiber, easy to digest, and help solidify loose stools without irritating your stomach further. The BRAT diet also provides relief for nausea and vomiting, not just diarrhea.
That said, this approach isn’t nutritionally complete. You shouldn’t stick with it for more than a day or two. As soon as you feel comfortable, start adding other bland, low-fat foods: plain crackers, boiled potatoes, steamed white fish, or scrambled eggs. The idea is to gradually reintroduce variety while keeping things gentle.
Ginger is one of the most reliable natural remedies for nausea. Clinical studies have tested dosages ranging from 250 milligrams to 2 grams per day, typically split into 3 to 4 smaller doses. Interestingly, higher doses didn’t outperform moderate ones, so a gram per day (about half a teaspoon of ground ginger, or a thumb-sized piece of fresh ginger steeped in hot water) is a reasonable target. Ginger tea, ginger chews, or even flat ginger ale with real ginger can help settle your stomach.
Protein Helps Your Body Repair
Your immune system runs on protein. Antibodies, immune cells, and the repair of damaged tissue all require amino acids. During recovery from infection, your body’s protein needs increase substantially. Research from Mount Sinai puts the recovery requirement at about 1.5 grams of protein per kilogram of body weight per day. For a 150-pound person, that works out to roughly 102 grams daily, which is significantly more than the standard recommendation of around 50 to 60 grams.
You don’t need to hit that number precisely, especially if you’re struggling to eat at all. But when you can tolerate food, lean toward protein-rich options: eggs, yogurt, bone broth, canned tuna, or a simple protein smoothie. Even small, frequent servings add up. Scrambled eggs and toast or yogurt with a banana are manageable meals that deliver protein without overwhelming a fragile appetite.
Foods That Fight Congestion
Spicy foods containing capsaicin (the heat in chili peppers) temporarily thin mucus and open nasal passages. If your sinuses feel packed, adding hot sauce to broth or eating a spicy soup can provide short-term relief. Warm liquids in general help loosen congestion, which is another reason broth-based soups outperform cold foods when you have a respiratory illness.
Citrus fruits and bell peppers are high in vitamin C, which supports immune cell function. While megadosing vitamin C supplements hasn’t proven to shorten colds dramatically, getting adequate vitamin C from food keeps your immune system operating at full capacity. An orange, a kiwi, or even a glass of orange juice (which doubles as hydration) covers your daily needs easily.
Dairy Doesn’t Make Mucus Worse
Many people avoid milk and cheese when they’re congested, believing dairy thickens mucus. This is a myth. Drinking milk does not cause the body to produce more phlegm. Research going back to 1948 tested this directly, comparing mucus levels in people who drank milk and those who didn’t, and found no difference. A more recent study in children with asthma also showed no change in symptoms between dairy milk and soy milk.
If yogurt, milk, or cheese sounds appealing when you’re sick, go ahead. Yogurt in particular offers protein, calories, and probiotics that support gut health, which is especially useful if you’re taking antibiotics or dealing with digestive symptoms.
What to Avoid
Alcohol dehydrates you and suppresses immune function. Even a single drink can interfere with sleep quality, and sleep is when your body does its most intensive repair work. Skip it entirely until you feel better.
Heavily processed, greasy, or very sugary foods are harder to digest and offer little nutritional return. Fried foods, candy, and sugary cereals provide calories but not the vitamins, minerals, or protein your immune system actually needs. Caffeine in moderate amounts is fine (coffee or tea won’t dehydrate you at normal intake levels), but avoid energy drinks, which combine caffeine with high sugar and can upset an already sensitive stomach.
Very high-fiber foods like raw vegetables, beans, and whole grains can aggravate diarrhea or nausea. Save those for when your digestion has stabilized, and stick with cooked, softer options in the meantime.