When you have a fever, your body burns through energy faster than normal. For every 1°C rise in body temperature, your metabolic rate increases by roughly 5 to 13%. That means you need more calories and fluids than usual, even though your appetite is probably telling you the opposite. The best foods during a fever are easy to digest, rich in protein and nutrients, and paired with plenty of fluids.
Why Eating Matters Even When You’re Not Hungry
A fever is your immune system working hard, and that work costs energy. Your body pulls from its stores of protein, carbohydrates, and micronutrients to fuel the fight against infection. If you skip meals entirely, you slow down your recovery and risk losing muscle mass during a prolonged illness. You don’t need to eat full meals, but getting some nutrition in throughout the day makes a real difference.
The challenge is that fever often kills your appetite. Nausea, fatigue, and a dulled sense of taste can make food unappealing. The strategy here isn’t to force three big meals. Instead, aim for small amounts of nutritious, high-energy food and drinks spread across the day. Think of it as grazing rather than dining.
The Best Foods to Reach For
Focus on foods that deliver protein and energy without making your stomach work overtime. Eggs are one of the best options: soft, protein-rich, and easy to prepare even when you’re exhausted. Scrambled, poached, or soft-boiled all work. Greek yogurt and cottage cheese are similarly gentle and packed with protein. Plain pasta or white rice with a little butter gives you quick energy. Skinless chicken or turkey, baked or broiled, provides the protein your immune system needs without excess fat that can slow digestion.
Other solid choices include:
- Bananas: easy on the stomach and a good source of potassium, which you lose through sweating
- Oatmeal or cream of wheat: warm, comforting, and easy to get down even with a sore throat
- Peeled, boiled potatoes: bland enough for a queasy stomach but calorie-dense
- Applesauce and canned peaches or pears: require almost no chewing and provide quick sugar for energy
- Toast or saltine crackers with peanut butter: a simple way to combine carbohydrates with protein and healthy fat
- Avocado: calorie-rich, soft, and full of nutrients
If solid food feels impossible, don’t stress. Smoothies made with milk, yogurt, and fruit can deliver a full meal’s worth of nutrition in a few sips. Pudding, custard, and even ice cream contain protein, vitamins, and minerals that help keep your energy up when chewing feels like too much effort.
Why Chicken Soup Actually Works
Your grandmother wasn’t wrong. A 2025 systematic review in the journal Nutrients found that chicken soup likely has genuine anti-inflammatory effects, possibly driven by its protein content. The chicken protein may help with mucosal repair and immune function, while vegetables in the soup add antioxidants and micronutrients that support your body’s defenses. Adding garlic and ginger, common in many recipes, brings additional compounds associated with respiratory and immune benefits.
Beyond the biochemistry, chicken soup is also just practical. It delivers fluid, salt, protein, and calories in a single bowl. The warm broth soothes a sore throat, the steam helps open nasal passages, and the salt replaces electrolytes you’re losing through sweat. It’s one of the few foods that checks every box at once.
Fluids Are More Important Than Food
Staying hydrated is the single most important thing you can do when you have a fever. Sweating, faster breathing, and an elevated metabolic rate all drain your fluid reserves quickly. A general goal for adults is 3 to 4 liters of fluids over 24 hours, which works out to roughly a cup every 40 minutes while you’re awake. You don’t need to hit that number exactly, but sipping consistently throughout the day matters more than gulping large amounts at once.
Water is the obvious choice, but it’s not the only one. When you’re sweating through a fever, you lose electrolytes like sodium and potassium along with water. Plain water alone won’t replace those. Broth-based soups, oral rehydration solutions, coconut water, and diluted fruit juice all help restore electrolyte balance. Milk-based drinks like plain or flavored milk are especially useful because they provide fluid, electrolytes, protein, and calories together.
If you’ve been vomiting alongside your fever, start slow. Small sips every few minutes are more likely to stay down than a full glass. Popsicles and gelatin are also good options since they deliver fluid in a form that’s easier to tolerate when your stomach is unsettled.
Foods and Drinks to Avoid
Some foods actively work against you during a fever. Fatty foods like pizza, fast food, and fried items are hard to digest and can worsen nausea. Alcohol dehydrates you and suppresses immune function. Highly processed foods and those loaded with added sugar provide empty calories without the nutrients your body needs to recover.
Caffeine is worth being careful with. A cup of tea or coffee won’t hurt most people, but large amounts act as a mild diuretic and can contribute to fluid loss when you’re already at risk of dehydration. If you’re a regular coffee drinker, a single cup is fine, but don’t rely on it as your main source of fluids.
Getting Enough Vitamin C From Food
Vitamin C won’t prevent a cold, but getting enough of it while you’re sick may shorten how long you feel terrible by roughly half a day during a typical week-long illness. You don’t need supplements to hit useful levels. One small orange contains about 51 mg of vitamin C, and an 8-ounce glass of orange juice delivers around 84 mg. Bell peppers, strawberries, kiwi, and broccoli are all rich sources too.
The daily recommended intake is 75 mg for women and 90 mg for men, but studies on cold recovery typically used around 200 mg per day. That’s easy to reach through food alone: a glass of OJ at breakfast and some fruit or vegetables later in the day will get you there. The upper safe limit is 2,000 mg per day, so there’s wide room between the minimum and any risk of overconsumption.
Feeding Children With a Fever
Kids with fevers need special attention around hydration because they dehydrate faster than adults. For babies under one year, stick to breast milk, properly mixed formula, or an oral rehydration solution like Pedialyte. Don’t give plain water to infants, and avoid fruit juices, sodas, and sugary drinks, which can worsen diarrhea.
For children over one, water, milk, popsicles made from rehydration solution, gelatin, and clear juices like apple juice are all appropriate. Start with small amounts given frequently: about 1 to 2 tablespoons every 20 minutes for a few hours. Sports drinks are not a substitute for oral rehydration solutions in young children.
Minimum fluid goals depend on your child’s weight. A child between 21 and 40 pounds needs at least 6.5 ounces per hour, while a child between 41 and 60 pounds should be getting at least 10 ounces per hour. These minimums go up if the child is also vomiting or has diarrhea. Watch for signs of dehydration: dark urine, dry or sticky mouth, no tears when crying, sunken-looking eyes, or unusual sleepiness. In infants, a sunken soft spot on the head is a warning sign that fluid loss has become serious.
For solid foods, the same principles apply as for adults. Offer small, simple portions of bland, easy-to-digest foods. Crackers, plain toast, bananas, applesauce, and yogurt are reliable standbys. Let your child lead. If they refuse food but are drinking fluids, that’s okay for a day or two. Pushing food on a nauseated child often backfires.