Natural Ways To Support Your Infant's Immune System

Probiotics and the Developing Immune System

Recently, there has been immense interest in the medical research regarding probiotics and how they influence the health of the body. Apart from helping heal gastrointestinal complaints (including Crohn’s, Ulcerative colitis, IBS and Celiac disease), probiotics have been shown to relieve anxiety and stress, lower blood pressure and also prevent antibiotic resistance to name a few. We are only beginning to understand the potential of our gut flora, and some of the most beneficial and promising research relates to newborns and how we can help optimize their health for their futures to come!

Probiotics and newborns: where it all begins…

The newborn gut is a perfect environment for microbes to live with food, moisture, and warmth. Its first inoculation of bacteria comes from the environment the baby is born into. It has been shown that vaginally delivered infants harbour bacteria resembling their own mother’s vaginal, rectal and skin microbiota which are Lactobacillus, Prevotella or Sneathia spp. dominant. To the same effect, infants born by C-section acquire bacteria similar to those found on the surface of the skin, such as Staphylococcus, Corynebacterium and Propionibacterium spp. as well as the hospital environmental microbiotia. The bacterial balance may also be influenced by antibiotic treatment as well as feeding choices (breastmilk, formula, food introduction, types of foods eaten)

The varying bacterial balances, have been shown in the literature, to influence the development of certain health conditions later in life. Children born by C-section, for example, have been shown to have a 2-fold higher prevalence of atopy (a tendency to develop allergic diseases such as allergic rhinitis, asthma and eczema) than those born by vaginal delivery. Furthermore, there is evidence that more than 50% of young children with severe atopic dermatitis will develop asthma and approximately 75% will develop allergic rhinitis. This suggests a possible correlation between the type of bacteria in the gut and the presence of atopy. Several studies have been conducted to prove this theory correct using probiotics.

Probiotics are “live organisms” which when taken orally, provide significant benefit by rebalancing the good and bad gut microflora. The gut has 400 trillion good bacteria and is up to 3000 square feet in surface area (as an adult). The good bacteria in the gut are responsible for healthy post-natal development. There are estimated to be 10,000-40,000 strains of good bacteria required to support healthy development of the brain, immune system and detoxification pathways with the research continuing to discover more interconnections. The numbers and types of bacteria in the gut is ever-changing due to their fast division rate and is strongly affected by the food we consume. In one particularly large study (215 infants aged 6-12 months), a comparison between formula milk with probiotic supplementation and formula milk alone was made and a series of health markers were monitored closely. Infants who received formula with probiotics showed a 46% reduction in the incidence rate of GI infections, 27% reduction in the incidence rate of the common cold and a 30% reduction in the total number of infections at the end of study period when compared to infants who were only fed formula (Maldonado et al J Pediatr Gastroenterol Nutr 2012).

Another large trial (454 mother-baby pairs), the Swansea Baby – Allergy Prevention Trial, was conducted to investigate the effect of probiotic administration in the prevention of allergy development in infants over 6 months and following up after 2 years. The results showed a 57% reduction at 2 years. This study was the first of this kind to show supplementation of good microbiota, for only the first 6 months of life, can positively shift the developing immune system to acquire the microflora as its own ultimately creating long lasting health benefits into adulthood. This finding is groundbreaking, as when starting to supplement with probiotics as an adult, the health benefits only last with continual probiotic supplementation (as seen in the research thus far.

Cough and colds are the most common infections we experience – often being a matter of “when” rather than “if”. Commonly adults catch a virus 2-3 times per year and children 3-8 times per year and probiotics have been shown to profoundly alleviate several aspects of inevitable annual sickness. The PROCHILD study evaluated 57 children aged between 4 and 6 years in a pre-school setting for 6 months and monitored illness. Total number of days with cold symptoms (sneezing, sore throat, cough, runny/blocked nose) had a 51% reduction in the probiotic group! The frequency of occurrence of cold symptoms reduced by 33% in the group taking probiotics. Most importantly, there was a 30% reduction in absence from preschool in the children taking probiotics! (Garaiova I et al 2014 Eur J Clin Nutr, doi: 10.1038/ejcn.2014.174)

The increasingly recognized profound impact that the microbiome has on human health cannot be underestimated – with impacts on virtually all aspects of human physiology.

Optimizing your child’s gut bacterial balance can be one of the most important things you can do to provide a foundation for health into their future. It is encouraged to talk to a naturopathic doctor or another health care professional who is educated in the latest research to help guide probiotic supplementation based on individual health needs. We are only beginning to understand the potential of this manipulation of gut flora and it provides a huge level of promise for the future.

Botanical Medicine and the Developing Immune System

 Herbal medicine has been used for centuries all over the world and contrary to some belief it can be very effective in supporting a newborn’s immune system in a very gentle and safe manner. The best way to prevent infection in an infant is to grow a healthy baby during pregnancy. A healthy baby is likely to have a well-functioning immune system with optimal resistance to illness. Good nutrition during pregnancy is one the most important factors in decreasing a baby’s susceptibility to infection.

An effective way to stimulate a newborn’s immune system as they fight off a general infection is the use of botanical herbs, which have the ability to do so in a safe and gentle way without taxing the body. Botanical herbs will decrease the duration and severity of symptoms during an infection while still allowing the normal immune response to take place without suppressing it. 

The following is a brief description of two herbs that the literature has found to be effective when treating general infections in newborns:

St. John’s Wort (Hypericum perforatum): mainly known for its use as an antidepressant, antimicrobial, sedative and anti-inflammatory. In addition, to it’s commonly recognized use as an antidepressant, St. John’s Wort is also known to be a sedative and restorative nervine with a potent calming effect. Its antimicrobial properties make it very effective in the treatment of upper respiratory and intestinal infections. This herb is also particularly useful in the presence of inflammation. It may also be used as an earache oil to treat the pain as well as the infection associated with ear conditions in infants.

Echinacea spp.: Well known for its immune stimulating effects, it is also a very potent anti-inflammatory, antimicrobial and antioxidant. It can be very useful in treating upper respiratory tract infections as well as eye infections. As an alternative to providing this herb to the baby directly, a nursing mother can also take an Echinacea tincture some of which will pass through her breast milk to the baby.  Echinacea decreases the duration of colds and reduces inflammation both internally and externally, and enhances overall resistance to illness. This herb is safe for young children as long as the dose is appropriate for their weight.

The previous descriptions of probiotics and botanicals are not meant to serve as a prescription, please see your Naturopathic Doctor to learn more about safety and dosages.

Dr. Nadine Khoury, ND and Dr. Kate Mclaird, ND. 


Antibiotic resistance: Plummer et al 2005, Int J Antimicrob Agents 26; 69-74

 Anxiety: (Messaoudi et al 2011)

GI: ((Orel et al World J Gastroenterol 2014, Ghouri et al Clin Exp Gastroenterol 2014)

Blood pressure: (Khalesi et al, Hypertension 2014)

(Spergel JM et al, Ann Allergy Asthma Immunol 2010; Spergel JM et al, J Allergy Clin Immunol 2003)

 Atopy 2 fold (Pistiner et al, J Allergy Clin Immunol 2008)

 Naturally Healthy Babies and Children (Aviva Jill Romm; Pownal, Vt.: Storey Books, 2000, 2003).

 Medical Herbalism The Science and Practice of Herbal Medicine (David Hoffmann, FNIMH, AHG; Healing Arts Press, 2003).