9 Tips for Boosting Your Child’s Immunity in 2026

As parents, keeping children healthy throughout the year is a top priority. While no food, supplement, or “miracle cure” can completely prevent illness, there are many evidence-based ways to support a child’s immune system naturally. A healthy immune system helps children recover faster from infections, reduce the severity of illnesses, and maintain overall wellbeing. Research consistently shows that lifestyle habits such as balanced nutrition, quality sleep, regular physical activity, stress management, and proper hygiene all play a major role in immune health.¹

Below are practical, science-backed tips parents can follow to help strengthen their child’s natural defences.

A child’s immune system relies heavily on proper nutrition. Immune cells require adequate vitamins, minerals, and protein to function effectively.² Diets rich in colourful fruits and vegetables provide nutrients such as vitamins A, C, and E, which help support immune responses.³

Foods that may support immune health include:

• Citrus fruits, berries, kiwi, and guava for vitamin C
• Carrots, sweet potatoes, and pumpkin for beta-carotene
• Leafy greens such as spinach and kale
• Lean proteins including eggs, chicken, fish, beans, and legumes
• Nuts and seeds containing zinc and healthy fats
• Yoghurt and fermented foods with probiotics for gut health

Research also highlights the importance of gut health, as a significant portion of the immune system is linked to the gastrointestinal tract.⁴ Including probiotic-rich foods in your child’s diet may help maintain a healthy balance of their gut bacteria.

If you’re concerned about your child’s dietary intake, a children’s oral nutritional supplement (ONS) such as PediaSure* may be beneficial. For personalised advice, please speak with your healthcare professional.

Sleep is one of the most important factors in immune function. During sleep, the body produces infection-fighting proteins called cytokines that help regulate immune responses.⁵ Getting enough sleep is an important part of supporting a child’s overall health and wellbeing.¹

General sleep recommendations include:⁶

• Toddlers (1–2 years): 11–14 hours including naps
• Preschoolers (3–5 years): 10–13 hours including naps
• School-aged children (6–12 years): 9–11 hours uninterrupted sleep
• Teenagers (13–17 years): 8–10 hours uninterrupted sleep

Creating a consistent bedtime routine, limiting screen time before bed, and ensuring a calm sleep environment can significantly improve sleep quality.

Keeping children active is important for overall health. Regular physical activity has been associated with anti-inflammatory effects and enhanced circulation of immune cells throughout the body.⁷ This means active children may be better equipped to fight off illness, stay healthy, sleep better, and experience lower stress levels.

Healthy activities may include:

• Outdoor play
• Bike riding
• Swimming
• Team sports
• Dancing
• Walking with family

Experts recommend that children engage in at least 60 minutes of moderate to vigorous physical activity each day.⁸ Excessive exercise without adequate recovery, however, may negatively affect immune function.⁷

Hydration is essential for overall health and supports the body’s natural defence systems. Water helps transport nutrients, regulate body temperature, and remove toxins.⁹ General daily water intake for Children by age:⁹

• 1–3 years: 4 cups (approx. 1L)
• 4-8 years: 5 cups (approx. 1.2-1.5L)
• 9-13 years: 7-8 cups (approx. 1.7-1.9L)
• 14-18 years: 8-11 cups (approx. 1.9-2.6L)

Children should be encouraged to drink water regularly throughout the day, especially during hot weather or physical activity.⁹ Limiting sugary drinks is also important, as excessive sugar intake has been associated with inflammation and immune imbalance.¹⁰

The gut microbiome plays a critical role in immune regulation.⁴ Beneficial bacteria in the digestive system help the body recognise harmful pathogens and maintain balanced immune responses.

Parents can support gut health by including:

• Yoghurt with live cultures
• Kefir
• Fermented foods
• Fibre-rich fruits and vegetables
• Whole grains

Avoiding unnecessary antibiotic use is also important, as antibiotics can disrupt healthy gut bacteria. Antibiotics should only be used when prescribed by a medical professional.¹

Chronic stress can weaken immune responses and increase susceptibility to illness.² Children may experience stress from school pressures, social situations, family changes, or overscheduling.

Ways to help reduce stress include:

• Encouraging open communication
• Allowing unstructured playtime
• Spending quality family time together
• Practising mindfulness or relaxation activities
• Ensuring a balanced routine

Helping children manage stress may support both emotional wellbeing and healthy immune function.¹

Good hygiene remains one of the simplest and most effective ways to prevent illness.¹¹ Teaching children healthy habits early can significantly reduce the spread of germs.

Important habits include:

• Washing hands with soap for at least 20 seconds
• Covering coughs and sneezes
• Avoiding touching the face
• Cleaning commonly touched surfaces
• Staying home when unwell

Handwashing is especially important before meals, after using the bathroom, and after coughing or sneezing.¹¹

Vaccinations are one of the safest and most effective ways to protect children against serious infectious diseases.¹² Vaccines work with the body’s natural defences to build protection against harmful diseases.

Parents should follow recommended immunisation schedules and consult healthcare providers about annual flu vaccinations and other age-appropriate vaccines.

Vitamin D plays an important role in immune regulation, and deficiency has been linked to increased susceptibility to infections.² Safe sun exposure, combined with vitamin D-rich foods, can help maintain healthy levels.

Supporting your child’s immune system does not require expensive products or complicated routines. The most effective strategies are often the simplest: nutritious meals, sufficient sleep, regular exercise, stress management, hydration, hygiene, and routine healthcare. These healthy habits work together to help children grow stronger, healthier, and more resilient over time.

*Food for Special Medical Purposes. Use under medical supervision.

References :
1. Boosting your child’s immune system, Harvard Heath Publishing, Accessed at: https://www.health.harvard.edu/blog/boosting-your-childs-immune-system-202110122614, Accessed May 2026. 2. Nutrition and Immunity, Harvard T.H. Chan School of Public Health, Accessed at: https://nutritionsource.hsph.harvard.edu/nutrition-and-immunity/, Accessed May 2026. 3. Calder P C, BMJ Nutrition, Prevention & Health. 2020;3, Accessed at: https://nutrition.bmj.com/content/3/1/74, Accessed May 2026. 4. Belkaid Y, Hand T, Cell. 2014;157(1):121-141, Accessed at: https://pmc.ncbi.nlm.nih.gov/articles/PMC4056765/, Accessed May 2026. 5. Besedovsky L, et al. Physiol Rev. 2019;99(3):1325-1380, Accessed at: https://pmc.ncbi.nlm.nih.gov/articles/PMC6689741/, Accessed May 2026. 6. Sleep recommendations by age, NSW Government, The Sydney Children’s Hospital, Accessed at: https://www.schn.health.nsw.gov.au/kids-health-hub/healthy-sleep-children/sleep-recommendations-age, Accessed may 2026 7. Nieman D C, Wentz L M, J Sport Health Sci. 2019;8(3):201-217. Accessed at: https://pmc.ncbi.nlm.nih.gov/articles/PMC6523821/, Accessed May 2026 8. 24-hour movement for all Australians | Australian Government, Australian Government Department of Health, Disability and Aging, Available at: https://www.health.gov.au/topics/physical-activity/24-hour-movement-guidelines-for-all-australians?language=en, Accessed May 2026 9. How Much Water Do You Need?, Harvard T.H. Chan School of Public Health, Accessed at: https://nutritionsource.hsph.harvard.edu/water/, Accessed May 2026 10. Ma X, Nan F, et al, Front Immunol. 2022;13:988481, Accessed at: https://pmc.ncbi.nlm.nih.gov/articles/PMC9471313/, Accessed May 2026 11. About Handwashing | Clean Hands | CDC, Centers for Disease Control and Prevention (CDC), Accessed at: https://www.cdc.gov/handwashing/, Accessed May 2026 12. Vaccines and immunization, World Health Organization (WHO), Accessed at: https://www.who.int/health-topics/vaccines-and-immunization, Accessed May 2026

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