Childrens Immune-Boosting Supplements: Nutrients That Help Keep Kids Healthy

• Children need to eat a balanced diet of all five food groups, which provides the body with the raw materials to produce antibodies and various cells that build immunity. However, after introducing new foods to children, parents should observe for at least 3-5 days to ensure the child does not have an allergic reaction to that food.
• For newborns to 6 months old, the best immune-boosting food is breast milk.
• Children's immune-boosting supplements should contain nutrients that strengthen immunity, including zinc, vitamin D, vitamin C, vitamin A, selenium, protein, and iron.

Many children fall ill easily, especially when starting school, while others have strong immunity and rarely get sick, allowing them to play and exercise fully. One key factor for proper growth is the child's immunity, which affects health, growth, strength, as well as development and learning differences. The immune system is a natural body mechanism that fights and protects against pathogens. Good immunity reduces the chances of infection and illness.

How does immunity or the immune system work?

Immunity or immune system (Immune) refers to the body's system that protects all cells from infection, inflammation, and damage by eliminating pathogens and foreign substances entering the body. The immune system results from the cooperation of various internal systems, including organs, cells, chemicals, and different proteins. If immunity weakens due to body system dysfunction or unhealthy behaviors, the body cannot fight external infections effectively, leading to frequent illness, longer recovery times, and increased risk of serious diseases in the future.

How does food build immunity in children?

Childhood is a stage where illness is more common than in adults because the immune system is not yet fully effective. Strengthening immunity in children is important through a balanced diet of all five food groups, providing the body with raw materials to produce antibodies and immune cells appropriately for their age.

Appropriate foods for children at different ages

Children should consume all five food groups to receive complete nutrition, energy, and support strength, age-appropriate growth, development, understanding, and learning. Recommended foods by age are as follows:

• Newborn to 6 months Feed the child exclusively breast milk.
• From 6 months onward Begin offering age-appropriate soft foods.
• 1 to 5 years old Children can eat with the family, starting with coarser foods: one ladle (about 5 tablespoons) of rice per meal, about 2 tablespoons of meat or 1 egg. They may eat half an egg and 1 tablespoon of meat.

Young children should start eating vegetables, choosing light-colored ones such as Chinese cabbage, kale, or broccoli, about half a tablespoon, with added oil for children needing extra energy to build nerve and brain cells. Rice bran oil is recommended because it contains essential fatty acids, omega-3 and omega-6, in ratios that support nerve and brain cell formation.

However, parents should observe their children for 3-5 days after introducing new foods to ensure no allergic reactions, watching for rashes or mucus with blood in stools.

• 6 years and older At school age, children can eat school meals supervised by nutritionists.

Children's immune-boosting supplements

Besides a balanced diet aiding age-appropriate growth, essential nutrients also stimulate immunity and protect children from illnesses, especially school-age children exposed to germs from peers. Immune-boosting nutrients and vitamins for children include:

Zinc

Zinc is an important mineral involved in various enzymes in the body and supports white blood cell function. Zinc deficiency leads to poor immunity. It is abundant in red meat, seafood, and egg yolks. Studies show zinc supplementation can increase children's height, but height depends not only on zinc but also on calcium and amino acids or protein.

Vitamin D

Vitamin D regulates white blood cell function and is found in sunlight. Dietary sources include deep-sea fish, egg yolks, and liver. Encouraging children to play outdoors is another way to get vitamin D.

Vitamin C

Vitamin C is an antioxidant that strengthens the body, found in green leafy vegetables and sour fruits like oranges, guavas, and strawberries. Vitamin C is easily lost through heat or prolonged refrigeration, so cooking methods like steaming or quick stir-frying are advised.

Vitamin A

Vitamin A supports immune system function. Good sources with high bioavailability include animal organs, egg yolks, milk, and dairy products.

Selenium  

Selenium is an antioxidant even more important than vitamin C, found in grains and red meat.

Protein

Protein repairs body tissues and supports white blood cell immunity. Protein deficiency often causes frequent and severe illnesses in children with slower recovery.

Iron

Red meats rich in iron include liver, pork, and chicken.

Tips for handling picky eaters

Many parents face challenges with picky or difficult eaters, resulting in insufficient nutrient intake. Ways to manage picky eaters include:

• Avoid excessive milk. After 1 year old, the main food should be rice, not milk. Children should eat three full meals and have 2-3 milk cartons daily. Drinking only milk cartons may cause vitamin C deficiency because the milk is heat-treated, which can lead to symptoms like limping, refusal to walk, and bleeding gums.
• Organize meal times well. The first meal after waking should be rice, followed by milk after a short interval. Avoid giving milk or snacks 2-3 hours before meals to ensure the child is hungry and ready to eat the next meal.
• Limit meal duration. Children should not be allowed to eat for more than half an hour per meal.
• Teach children healthy eating behaviors. Adjustment time varies; some children take 3-4 weeks, others up to 1-2 months.
• Be patient and give children time to learn. Parents should calmly offer disliked foods repeatedly 10-15 times, as children naturally take time to get used to new textures or smells.
• Observe children's preferences. For children who only eat preferred foods, parents can offer unfamiliar foods for the first 10 minutes, then allow the child to eat favorite foods for the next 20 minutes.
• Encourage drinking water. Fruit juices or soft drinks can lead to a sweet tooth and potential overweight issues as the child grows.
• Adjust family behaviors. Parents should set an example by avoiding foods or drinks they do not want their children to consume or not keeping such items at home.
• Choose healthier snacks. Instead of sweets, parents may offer items like steamed dumplings, buns, or jelly. Replace candies with fruit and ice cream with yogurt, frozen fruit, or smoothies.
• Make agreements. Parents might agree with children that they can have a small treat after meals.
• Food substitutions to reduce boredom. Parents can offer alternatives such as carbohydrates: one ladle of rice = one slice of bread = half a sticky rice wrap = a handful of macaroni or noodles; proteins: pork, chicken, fish, tofu.
• Praise children when they eat well, using words or stickers as rewards.
• Involve older children in meals, such as carrying plates or setting the table.
• Make plates visually appealing to attract children.
• Eat meals together at the table in a positive atmosphere.
• When dining out, choose clean restaurants serving freshly cooked, thoroughly cooked, and safe food for children.

Food is important. Proper nutrition helps children grow strong, proportional, age-appropriate, and fully develop their potential. If children receive insufficient energy, vitamins, or minerals, parents should adjust food and behaviors. If unable or concerned, parents should take their child to a doctor for further examination or appropriate advice.

Acknowledgments Dr. Thanisa Kwanboonbampen, pediatric nutritionist at Samitivej International Children's Hospital (Srinakarin).