Foods to Avoid When Sick (and What to Eat Instead!)

Feeling under the weather? ‘Tis the season. Whether you’re battling a cold, flu, or stomach bug, knowing what to eat (and what to skip) is crucial. Fortunately, the right foods are a powerful weapon for a speedy recovery. Curious about what helps and what hinders? I’m breaking down the best comfort foods for healing—and on the flip side, the foods to avoid when sick. Here’s to nourishing your body, one healing bite (or sip) at a time.

butternut squash soup_foods to avoid when sick

The Truth About Popular Sick-Day Remedies

When a winter cold or flu knocks you off your feet, do you typically reach for canned soup or Gingerale? You’re not alone. We’ve been conditioned to think these are go-to remedies. But are they truly helping you recover? When illness strikes, your immune system needs targeted nutrients to work effectively—not sugary, ultra-processed foods (hello, saltines, Gatorade, or flavored yogurt). These actually slow down the healing process. Instead, your recovery depends largely on feeding your body nutrient-dense foods that strengthen your immune system.

Feed a Cold, Starve a Fever—Is This the Best Approach?

“Feed a cold, starve a fever”— sound familiar? This has origins in a 16th-century dictionary and has (unfortunately) been passed down as common advice. The premise is that because a cold makes you feel chilled, you should warm yourself back up by eating. But if you have a fever, you should fast to help you cool down. Here’s the kicker: this idiom has little scientific backing. The reality is, your body needs nutrients and energy to fight any illness—I.e. warm herbal teas, mineral-rich broths, and small, balanced meals (roasted sweet potato with chicken and avocado) can go a long way in helping you feel better.

honey and lemon_foods to avoid when sick

All About the BRAT Diet

Similarly, many of us turn to the BRAT diet—bananas, rice, applesauce, and toast—when feeling nauseous. These bland foods are popular because they’re easy to digest and they’re gentle on the stomach. However, they’re primarily made up of simple carbs, which can cause a quick blood sugar spike followed by a crash (potentially making nausea and dizziness worse). They’re also missing key nutrients your body needs to recover! If toast sounds comforting, consider swapping it for a slice of low-carb bread topped with ghee and flakey salt or nut butter and a few banana slices. This combo provides protein, healthy fats, and fiber to help stabilize blood sugar and support healing.

Immune-Boosting Nutrition: What to Eat When You’re Sick

Want an effective immune response? Prioritize nutrient-dense meals rich in vitamin C, vitamin D, and zinc—try steamed cauliflower, salmon, and pumpkin-seed pesto for a wholesome, immune-boosting dinner. Additionally, adequate protein is imperative for tissue repair and antibodies (pair your protein with small amounts of complex carbs, like sweet potatoes or quinoa for fiber and energy). And don’t forget healthy fats—I.e. olive oil and avocado—to absorb fat-soluble vitamins. Last but not least, support your gut with probiotics from Greek yogurt (or kefir) and mild prebiotics like bananas or oatmeal. A healthy gut houses 70% of immune cells!

Salmon with rice_foods to avoid when sick

What Foods to Avoid When You’re Sick

When you’re sick, it’s just as important to steer clear of certain foods that can hinder recovery. Ultra-processed foods (muffins, sugary drinks, etc.) can suppress immune function and increase inflammation. These foods can also disrupt blood sugar levels, leading to energy crashes. Additionally, it’s best to avoid heavy, greasy foods (like fries), as they can burden your digestive system and increase nausea. Lastly, be mindful of dairy if you’re prone to congestion—it can thicken mucus and make breathing harder.

The Importance of Electrolytes

Of course, staying hydrated is key! Replenish fluids with water, herbal teas, and broths. Teas like ginger or turmeric offer soothing antioxidants and anti-inflammatory benefits, while broths provide essential minerals along with protein (from collagen). And don’t underestimate the power of electrolytes. Electrolyte balance is just as important—these minerals regulate fluid levels, nerve function, and muscle contractions. To avoid fatigue or cramps, opt for natural sources like coconut water or unsweetened electrolyte drinks instead of sugary sports drinks.

For a simple homemade option, mix coconut water, fresh lime juice, a pinch of Himalayan salt, and water for a refreshing electrolyte boost.

Lemon water and soup_foods to avoid when sick

What to Eat (Meal Plan) When You’re Sick

When you’re feeling under the weather, your meals should focus on hydration, gentle nourishment, and immune support. Here’s a sample day of eating to help you recover:

Morning

Start your day with a glass of warm water with lemon, a pinch of sea salt, and raw honey to soothe your throat and boost vitamin C intake.
For breakfast, whip up a smoothie made with unsweetened almond milk, a scoop of chocolate protein powder, frozen berries, spinach, chia seeds, and a handful of walnuts.

Lunch

Make a batch of chicken soup with bone broth, shredded chicken, onion, carrots, celery, and brown rice pasta for a hydrating, nutrient-packed meal.
For added nutrients, include lemon juice and fresh cilantro.

Afternoon Snack

A cup of ginger tea and a piece of sourdough toast with cottage cheese.

Dinner

Baked turkey meatballs (buy frozen) with roasted sweet potatoes and steamed broccoli for immune-supporting nutrients.
For added nutrients, top your broccoli with olive oil and nutritional yeast.

Before Bed

A soothing chamomile tea and a few squares of extra dark chocolate.

Cauliflower soup_foods to avoid when sick

A Guide to Supporting Your Recovery

Not to sound like a broken record, but when you’re under the weather, choosing the right foods can make all the difference in how quickly you recover. While some foods can provide the nutrients your body needs to heal, others can actually lengthen your recovery. Here’s a recap of what to avoid when you’re sick:

Sugary, Processed Foods
Refined sugars found in candy, baked goods, sodas, and sugary drinks can suppress immune function and trigger inflammation. These foods may also cause blood sugar spikes followed by crashes, which can leave you feeling even more fatigued and unwell.
Greasy and Fried Foods
Heavy, greasy foods like fried chicken, French fries, and fast food can be tough on your digestive system, leading to bloating and discomfort. These foods can also increase inflammation, which might make symptoms like congestion and aches worse.
Dairy (If You’re Congested)
Dairy products like milk, cheese, and ice cream can thicken mucus for some people, which can worsen congestion and make it harder to breathe. If you’re dealing with a cold or sinus infection, consider limiting dairy to see if it affects your symptoms.
Alcohol and Caffeinated Beverages
Both alcohol and caffeine can dehydrate the body, which is the last thing you want when you’re sick. Staying hydrated is key to helping your body fight off illness, so it’s best to avoid alcohol and limit caffeine intake while you’re recovering.
Processed Meats and Salty Snacks
Processed meats (like deli meats, hot dogs, and sausages) and salty snacks can be high in preservatives and sodium, which can contribute to dehydration and bloating. When you’re sick, it’s important to focus on whole foods that support hydration and healing.

Instead, focus on nutrient-dense meals rich in vitamins, minerals, and healthy fats, which will give your body the support it needs to heal. By making the right food choices, you can speed up your recovery and feel better sooner.