Supporting Your Child's Immune System During Cold and Flu Season: Start With the Basics
As the weather cools and we move into winter, many parents start thinking about the same thing: How can I help my child stay healthy this cold and flu season?
Between school, daycare, extracurricular activities, birthday parties, and time spent around other children, exposure to viruses is inevitable. In fact, getting sick is a normal part of childhood as the immune system encounters new germs and learns how to respond to them.
While we cannot prevent every sniffle, cough, or fever, we can help support our children's immune systems by focusing on the foundations of good health.
And surprisingly, some of the most effective ways to support immune health have very little to do with medicine or supplements.
1. Prioritize Consistent Sleep
Sleep is one of the most important, and often overlooked, components of a healthy immune system.
While our children sleep, their bodies are busy growing, repairing, regulating hormones, and supporting the immune responses needed to fight infection. Inadequate sleep can interfere with these processes and make it harder for the body to function optimally.
One of the best things we can do is establish consistent sleep and wake times, even on weekends as much as possible.
A few practical ways to support healthy sleep:
Establish a predictable bedtime routine.
Turn off screens at least an hour before bedtime
Keep bedrooms cool, dark, and comfortable (with no screens in the bedroom).
Get outside and enjoy natural daylight during the daytime.
Aim for age-appropriate sleep rather than simply focusing on getting through the day.
How much sleep does your child need?
Infants (4–12 months): 12–16 hours, including naps.
Toddlers (1–2 years): 11–14 hours, including naps.
Preschoolers (3–5 years): 10–13 hours, including naps.
School-aged children (6–12 years): 9–12 hours.
Teenagers (13–17 years): 8–10 hours.
Consistency matters. A predictable routine helps children get the restorative sleep their growing bodies need.
2. Feed the Immune System With a Variety of Whole Foods
Our immune systems rely on a wide variety of vitamins, minerals, antioxidants, and other nutrients to function properly. While no single food can prevent illness, a well-varied diet provides the building blocks our bodies need to maintain healthy immune function.
Here are a few nutrients worth paying attention to:
Vitamin C: Supports immune cell function
Vitamin C is an antioxidant that helps protect cells from damage and supports several important immune functions. It also plays a role in collagen production and wound healing.
Food sources include:
Oranges, grapefruit, and mandarins
Strawberries
Kiwi
Bell peppers
Broccoli
Tomatoes
Vitamin D: Important for immune regulation
Vitamin D plays an important role in regulating both the innate and adaptive immune systems. It also supports healthy bones, muscle function, and overall growth and development.
Food sources include:
Salmon and other fatty fish
Egg yolks
Fortified milk
Fortified dairy alternatives
Fortified cereals
Vitamin D can be a nutrient of concern in children who have limited dietary sources, so supplementation may be appropriate depending on age, diet, and individual needs.
Vitamin D deficiency is the top deficiency Dr. Lauren sees in patients hospitalized. If your child’s level hasn’t been checked, talk to Dr. Lauren about when we can evaluate your child.
Zinc: Essential for immune cell development and function
Zinc is involved in numerous processes within the immune system. Adequate zinc is important for normal immune cell development, wound healing, and maintaining the body's protective barriers.
Food sources include:
Beef and poultry
Eggs
Beans and lentils
Pumpkin seeds
Nuts
Dairy products
Zinc deficiency is the next deficiency Dr. Lauren sees frequently in hospitalized patients. If your child’s level hasn’t been checked, talk to Dr. Lauren about when we can evaluate your child.
Vitamin A: Supports the body's protective barriers
Vitamin A helps maintain the health of the skin and the lining of the respiratory and gastrointestinal tracts. These tissues are important barriers between our bodies and the outside world.
Food sources include:
Sweet potatoes
Carrots
Spinach
Kale
Eggs
Iron: Supports oxygen transport and immune function
Iron is essential for carrying oxygen throughout the body and plays an important role in normal immune cell function. Iron deficiency can affect a child's growth, development, and immune health.
Food sources include:
Beef
Poultry
Beans and lentils
Spinach
Iron-fortified cereals
Pairing plant-based sources of iron with vitamin C-rich foods can help improve iron absorption.
Don't forget protein!
Our bodies need protein to build and repair tissues and produce many of the components involved in immune defense. We have a whole group of nutrients called “essential amino acids” which are the building blocks that our body requires us to consume, since we cannot make these building blocks alone. These essential amino acids come from protein sources.
Include a variety of protein sources such as eggs, poultry, fish, meat, yogurt, beans, and lentils.
The goal isn't perfection at every meal. It is offering a variety of nutrient-dense foods over time.
3. Remember That Healthy Habits Extend Beyond Food and Sleep
A healthy immune system benefits from more than just vitamins and minerals.
Other important habits include:
Regular physical activity and outdoor play.
Adequate hydration.
Frequent handwashing (and telling my kids to keep their fingers out of their noses).
Managing stress and supporting emotional well-being.
Staying up to date on recommended childhood immunizations, including the annual influenza vaccine.
These habits work together to support overall health and help our children's bodies respond to the germs they encounter.
4. But What If My Child Isn't Eating a Well-Varied Diet Yet?
Let's be honest. We are all on a journey when it comes to helping our children eat a consistent, well-varied diet.
Some children happily eat broccoli, salmon, and berries. Others would prefer to survive exclusively on a white diet of crackers, chicken nuggets, and the occasional bite of something with color.
And many children fall somewhere in between!
As parents, we can continue offering new foods, modeling healthy eating, involving children in meal preparation, and creating positive experiences around food. But we also recognize that nutritional gaps can happen along the way.
This is where thoughtfully selected supplements may have a role.
Supplements aren't a replacement for a nutritious diet, and taking extra vitamins doesn't necessarily mean a child will get sick less often. However, when dietary intake is limited or a child has an increased need for a particular nutrient, supplementation may help fill nutritional gaps.
Here are a few options worth discussing with Dr. Lauren:
Supplements to Consider
1. Children's Multivitamin
For children with particularly limited diets, a quality age-appropriate multivitamin may help fill some nutritional gaps.
Look for a product that provides nutrients near age-appropriate daily requirements rather than excessive doses. Remember that a multivitamin isn't a substitute for a varied diet.
2. Vitamin D3
Vitamin D is one nutrient I pay particular attention to in pediatric health.
Depending on a child's age, diet, sun exposure, and individual risk factors, vitamin D supplementation may be appropriate. The American Academy of Pediatrics recommends
400 IU daily for infants under 12 months and
600 IU daily for children over 12 months through dietary intake and/or supplementation.
Again, remember that Vitamin D deficiency is a very common variable in hospitalized children, so perhaps keeping kids in the healthy range is an important factor in keeping kids out of the hospital this winter.
3. Vitamin C
If your child struggles to eat fruits and vegetables, vitamin C intake may be worth evaluating.
A vitamin C supplement can help meet nutritional needs when dietary intake is insufficient. Some research suggests regular vitamin C supplementation may modestly shorten the duration of common colds, although it does not reliably prevent children from catching them.
Whenever possible, I prefer obtaining vitamin C through whole foods because they provide additional fiber, antioxidants, and other beneficial nutrients.
4. Zinc
Zinc is essential for normal immune function, and inadequate intake can compromise the body's ability to respond to infection.
Children who eat limited amounts of meat, seafood, beans, nuts, and other zinc-containing foods may benefit from having their intake evaluated.
The interesting thing is that when zinc levels drop, then the child’s sense of smell and taste are then altered, then making kids more picky, which then means they eliminate more foods.
Although some studies suggest zinc may shorten the duration of a common cold, evidence in children is less established. Zinc supplementation should be individualized, as excessive intake can cause gastrointestinal symptoms and interfere with copper absorption.
Avoid intranasal zinc products.
5. Probiotics
Our gut and immune systems are closely connected. The gastrointestinal tract houses a large population of microorganisms that interact with our immune system and help maintain a healthy intestinal environment.
Probiotics are live microorganisms that may offer health benefits when specific strains are taken in appropriate amounts.
Research on probiotics and respiratory infections in children is still developing. Some studies suggest certain strains may modestly reduce the frequency or duration of respiratory infections, but benefits are strain-specific and cannot be assumed for every probiotic product.
Probiotics can also be found naturally in foods such as yogurt with live cultures and kefir.
A Final Thought: Build the Foundation, Not Just the Supplement Routine
When it comes to immune health, there isn't one magic vitamin, supplement, or food that will keep our children from getting sick.
Instead, think about the bigger picture.
Are we prioritizing consistent sleep? Are we regularly offering a variety of whole foods? Are we encouraging outdoor play, movement, and emotional well-being? Are we addressing nutritional gaps when they arise?
These everyday decisions add up.
And remember, getting sick occasionally doesn't mean you've failed at supporting your child's immune system. Even children with excellent nutrition and healthy routines will catch viruses. That's part of childhood.
My goal as a pediatrician is to look beyond the immediate illness and consider the bigger picture of a child's health. By focusing on nutrition, sleep, lifestyle, and individualized support, we can help build a strong foundation for health throughout childhood.
At Anchor in Tide, I believe in helping families navigate these decisions without judgment, with practical guidance and individualized care.
Because supporting your child's health is about more than treating the next cold. It's about supporting the whole child, all year long.
Have questions about your child's nutrition, sleep, or supplement needs? I'd love to help you navigate that journey.
Dr. Lauren Sadovsky, DO
Anchor in Tide | Pediatric Health & Wellness
This post is educational and is not a substitute for medical advice. If you have questions about your child's behavior, attention, or development, talk with your pediatrician