When you’re sick, the best foods are ones that deliver fluids, calories, and nutrients without making your symptoms worse. What you should reach for depends on whether you’re dealing with a cold, a sore throat, a stomach bug, or general fatigue. The common thread is simple: easy-to-digest foods that keep you hydrated and give your immune system fuel to work with.
Chicken Soup Earns Its Reputation
Chicken soup isn’t just comfort food. Lab research 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 part of the inflammatory response that causes congestion, a stuffy nose, and that swollen feeling in your airways. By slowing their migration, chicken soup may help reduce upper respiratory symptoms. Interestingly, both the chicken and each of the vegetables in the soup showed this anti-inflammatory activity on their own.
Beyond the science, soup also checks the most important box when you’re sick: it’s a warm liquid packed with sodium and water. You lose fluids faster when you have a fever or are congested, and broth-based soups replace those losses while delivering protein from the chicken and micronutrients from the vegetables. If you don’t have homemade soup on hand, even a store-bought version with real chicken and vegetables will do.
Best Foods for a Cold or Respiratory Illness
Zinc plays a direct role in how quickly your body fights off a cold. A review of clinical trials found that daily zinc intake above 75 milligrams shortened cold duration, while doses below that threshold showed no benefit. You probably won’t hit 75 milligrams from food alone on a given day, but zinc-rich foods still support your baseline immune function. Good sources include oysters, beef, pumpkin seeds, lentils, and chickpeas.
Citrus fruits, bell peppers, and strawberries are high in vitamin C, which helps immune cells function properly. Ginger, whether sliced into hot water or added to soup, has natural anti-inflammatory properties that can ease nausea and soothe irritated airways. Garlic contains sulfur compounds that support immune activity, and it’s easy to add to broth or cooked vegetables.
Honey for Coughs and Sore Throats
If a cough is keeping you up at night, honey is one of the most effective things you can swallow. A clinical trial comparing honey to a common over-the-counter cough suppressant (dextromethorphan) found no significant difference between the two. Honey reduced cough severity by about 47% compared to roughly 25% with no treatment at all, and the overall symptom score dropped by nearly 54%. The cough suppressant, meanwhile, performed no better than doing nothing.
A spoonful of honey before bed coats the throat and seems to calm the cough reflex. Buckwheat honey was used in the study, but any dark, raw honey works well. Stir it into warm tea or just take it straight. One important note: honey should never be given to children under 12 months old due to the risk of botulism.
What to Eat With a Stomach Bug
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s still a reasonable starting point for the first day or two of stomach flu, food poisoning, or traveler’s diarrhea, but Harvard Health notes there’s no need to restrict yourself to just those four foods. They’re low in fiber and easy on the gut, but they’re also low in protein and key nutrients you need to recover.
Other gentle options that digest well include oatmeal, boiled potatoes, crackers, unsweetened dry cereal, and brothy soups. Once you can keep food down for several hours, start adding more nutritious choices: cooked squash (butternut or pumpkin), cooked carrots, sweet potatoes without skin, avocado, skinless chicken or turkey, fish, and eggs. These are all bland enough to avoid triggering nausea but contain the protein and vitamins your body needs to rebuild.
Staying hydrated matters more than eating when vomiting or diarrhea is the main symptom. Small, frequent sips of water, diluted juice, or an electrolyte drink are more effective than trying to gulp down a full glass at once.
Fermented Foods and Gut Recovery
Yogurt, kefir, kimchi, and other fermented foods contain live bacteria that support your gut microbiome. This matters during illness because your gut houses a large portion of your immune system, and antibiotics or stomach bugs can disrupt the bacterial balance. A randomized trial in children with upper respiratory infections found that a specific probiotic formula reduced the duration of fever by about one day and pain or discomfort by roughly 0.7 days compared to placebo.
If you’re dealing with a stomach illness, plain yogurt with live active cultures is the gentlest option. Avoid heavily sweetened versions, since excess sugar can worsen diarrhea. If dairy bothers your stomach, a probiotic supplement or a small serving of miso soup offers similar benefits.
You Don’t Need to Avoid Dairy
A persistent belief says that milk and dairy products increase mucus production when you have a cold. The evidence doesn’t support this. Studies going back decades have found no increase in actual mucus output among people who drink milk while sick. Research in children with asthma, who would be especially sensitive to airway changes, showed no difference in symptoms between those drinking dairy milk and those drinking soy milk.
What does happen is that milk and saliva mix to form a slightly thick coating in the mouth and throat. That sensation can feel like extra phlegm, but it isn’t. It’s a temporary textural effect that clears quickly. So if yogurt, warm milk, or cheese sounds good to you while you’re congested, go ahead.
Foods to Skip While You’re Sick
Some foods make symptoms worse even if they’re normally healthy. Rough, crunchy foods like chips, raw vegetables, and crusty bread can irritate a sore throat. Spicy foods may clear your sinuses momentarily but can aggravate acid reflux and upset an already sensitive stomach. Fried and greasy foods are harder to digest and can worsen nausea.
Alcohol dehydrates you and suppresses immune function. Coffee in moderation is fine if you tolerate it, but large amounts can also dehydrate and may upset your stomach when you’re already queasy. Sugary sodas and candy provide empty calories without the nutrients your body is actively demanding.
Eating When You Have No Appetite
Loss of appetite is one of the most common symptoms of illness, and forcing down a full meal isn’t necessary. Your body redirects energy toward fighting infection, which naturally suppresses hunger. The priority is fluids first, then small amounts of nutrient-dense food when you can manage it.
Try eating in small portions every two to three hours rather than sitting down to a regular meal. A few spoonfuls of soup, half a banana, a couple of crackers with peanut butter, or a small bowl of oatmeal all count. Smoothies made with frozen fruit, yogurt, and a handful of spinach pack a lot of nutrition into something you can sip slowly. Protein is especially important because your immune system relies on amino acids to produce antibodies and repair tissue. Even a scrambled egg or a few bites of chicken makes a difference compared to eating nothing but crackers for days.