You’ve probably heard that probiotics are important for good digestion and immune function. But does that mean you should supplement your child’s diet with them? Which probiotic strains offer the best support for your child’s digestive system or help relieve constipation?
WHAT ARE PROBIOTICS?
Probiotics are a combination of live beneficial bacteria (and/or yeasts) that naturally live in our bodies. We all carry a mix of good and bad bacteria. Probiotics exist naturally in certain foods and are also available as dietary supplements in powder, capsule, and tablet forms. According to the World Health Organization and the Food and Agriculture Organization of the United Nations, probiotics are “live microorganisms, which, when administered in adequate amounts, confer a health benefit on the host.”
So we know that probiotics are good for us. Should we rely on probiotic-rich foods alone? Do we need supplements? If so, which strain? At what dose? For how long? And for what specific benefit?
THE PROBIOTIC STRAINS ARE KEY
When we say “probiotics,” we’re not talking about a single type. There are many different species, and within each species, multiple strains. The strain level is crucial because different strains serve different purposes.
GENUS: A genus is a biological classification of living organisms. The term comes from the Latin genus meaning group. A genus contains one or more species. Examples of common probiotic genera include Bifidobacterium and Lactobacillus.
SPECIES: ‘Species’ refers to a type of microorganism existing within a genus or family. For example, acidophilus is the name of a species within the Lactobacillus genus.
STRAIN: A probiotic ‘strain’ is a genetic variant or subtype of a species. Different probiotic supplements contain different strains, which may be classified under the same species and genus. However, one acidophilus is not equal to another acidophilus. It’s the strain level that matters when you choose a probiotic in order to help with a specific health condition. If you neglect to pay attention to the specific strains in the kids probiotic, you may not be able to gain the health benefits you desire, and as such, be wasting your money.
Different supplements contain different strains. Two products may both include Lactobacillus acidophilus, but only specific strains are proven to benefit particular health conditions. If you don’t pay attention to the strain, you might not get the benefits you’re expecting and end up wasting money.
Bifidobacterium longum BB536;
Bifidobacterium breve M-16V;
Bifidobacterium infantis M63;
Lactobacillus acidophilus LAC 361;
Galacto-oligo saccharides (GOS)
THE NUMBERS OF THE PROBIOTIC STRAINS MATTER
Probiotics are measured in colony forming units (CFUs), which indicate the number of viable (live and active) bacteria cells. Product labels may express amounts as, for example, 1 x 109 for 1 billion CFU or 1 x 1010 for 10 billion CFU. Most probiotic supplements contain 1 to 10 billion CFU per dose, but some products contain up to 50 billion CFU or more. However, a higher CFU count doesn’t necessarily lead to better health effects.
Manufactures should list storage conditions on the label. Stability testing is typically conducted under the same temperature conditions as the recommended for storage. Because probiotics must be consumed alive to provide health benefits and some bacteria can die over time, look for products that specify the number of CFUs at the end of the product’s shelf life (the expiry date), not just at the time of manufacture.
When choosing a probiotic for your child, the amount of each strain matters. Most research suggests that a minimum of 1 billion CFU (1 x 109) per strain is needed to produce a therapeutic effect. So you need to think in billions when selecting a supplement.
Some children’s gummies and probiotics snack bars may not contain enough CFUs to be therapeutically effective.
For infants, the dosage should be 5-10 billion CFU per day. For children over the age of 2, the desired dosage should be 10-25 billion CFU per day.
CONSIDERING YOUR CHILD’S AGE IS IMPORTANT
Infants have less diverse gut microbiome compared to older children and adults. It’s estimated that young babies have approximately 10 different bacterial species, whereas adults may have over 1000 species. In babies born vaginally, microbiome is predominantly made up of Bifidobacterium species, whereas in adults, it is more commonly dominated by Lactobacillus species.
After the age of 2, a child’s gut microbiome starts to resemble that of an adult and becomes significantly more stable.
As a result, for children over the age of 2, you’ll want a probiotic supplement with a higher dosage of beneficial bacteria. At this stage, you don’t necessarily need to stick to kids-specific products and brands, many adult formulations may be appropriate.
If you’re breastfeeding, it’s also worth assessing your own gut health, as beneficial bacteria can be transferred from your intestines to your baby through breastmilk.
WHEN MIGHT YOUR CHILD NEED A PROBIOTIC SUPPLEMENT?
Probiotics can be helpful in certain situations. Here’s what research shows:
Antibiotic-Associated Diarrhea
Up to 40% of children on antibiotics experience diarrhea (here, here). Antibiotics wipe out both good and bad bacteria in the gut. Probiotic strains like Lactobacillus rhamnosus GG and Saccharomyces boulardii can help restore balance and reduce the risk of diarrhea. Take the probiotic a few hours after the antibiotic dose to avoid inactivation.
Acute gastroenteritis (not related to antibiotic use)
If your child gets a stomach bug, these same strains—L. rhamnosus GG and S. boulardii—may shorten the duration of diarrhea by about one day (here).
Constipation
The evidence is still limited. Some studies show slight improvements in stool frequency, but there is no strong consensus on which strain or dose is most effective (here).
Atopic Dermatitis / Eczema
Several studies and reviews have looked at the role of probiotics in preventing and treating atopic dermatitis. While some of the research has provided mixed reviews, many studies have found that infant at risk for developing eczema have benefited from taking probiotics with the Lactobacillus rhamnosus GG strain (here). Other beneficial strains include Bifidobacterium lactis UABLA-12 and Lactobacillus acidophilus DDS-1 (here)
And, the protective effect of probiotics may be strongest when given to pregnant mothers. Three studies using Lactobacillus rhamnosus GG given to pregnant women for 2-4 weeks before labour and continued treatment post-birth found significantly lower rates of eczema/atopic dermatitis during the first 2 years of life (here, here, here) so we probably want to make sure that moms are getting a good supply of these beneficial bacteria before baby is even born.
A New Zealand study was the first randomised controlled trial to show that Lactobacillus rhamnosus HN001 can be beneficial for childhood eczema. The key is to start supplementation with rhamnosus HN001 early from 35 weeks of pregnancy until two years of age (here).
The health benefits of rhamnosus HN001 include reduced risk of childhood eczema by 44% up to age 6. The protection continued even after supplementation was stopped by the child’s 2nd birthday. This confirms that not all probiotics are the same. Rhamnosus HN001 is also thought to reduce symptoms of postpartum depression in women.
Functional Gastrointestinal Disorders
A recent systematic review focused on probiotics and functional gastrointestinal disorders in children birth – 18 years yielded no studies on infants and young children (birth – 2 years old). While their search included studies on probiotics that reported on gastrointestinal outcomes such as abdominal pain, stool frequency, stool consistency and bloating/flatulence, these studies did not include infants and young children. Therefore, as evidence is not available for infants and young children, no probiotics can be recommended to improve functional gastrointestinal disorders for those 2 years and under at this time (here).
Infantile Colic
Colic is difficult to understand, and even more difficult to treat. As a parent who has lived through colic, I know and understand the desperation in trying to find a solution. Research shows that a specific bacterial strain called Lactobacillus reuteri 17938 has been associated with decreased crying spells in exclusively breastfed infants during the first three months of life (here, here, here, here. here, here).
Immune Health
As parents, we’re always looking for ways to reduce the number of colds and flus that find their way into our lives! Maintaining a healthy population of gut bacteria, along with a healthy diet and lifestyle may be key to staying healthy during cold and flu season. A recent meta-analysis of probiotic use (specifically Lactobacillus and Bifidobacterium strains) in children and adults revealed significantly fewer numbers of days of illness per person, shorter illness episodes by almost a day, and fewer numbers of days absent from day care/school/work (here).
WHAT TO LOOK FOR IN PROBIOTIC SUPPLEMENTS
If you’ve decided to buy a probiotic supplement for your children, prepare yourself for a dizzying array of options. The particular brand you purchase doesn’t matter as much as a few key criteria, which I’ve outlined for you below:
- “Live, active cultures.” Make sure the supplement you choose contains this actual phrase right on the bottle, so you can be sure you’re getting an effective product. Some brands of probiotic supplements even come refrigerated to help protect these living cells.
- High bacteria count. The concentration of bacteria in probiotic supplements is measured in CFUs (that’s “colony forming units.”) Look for a probiotic supplement that has, at a minimum, 1 billion CFUs (on the “expiration” or “use by” date on the product label).
- Multiple strains. Balance matters! Different strains of probiotics can have different health effects. A supplement with eight or ten different strains of bacteria may help to diversify the bacteria that make up your kids’ microbiome.
- Enteric coating. This refers to a hard coating on the outside of the pill that lets it survive the journey through the harsh, acidic stomach. An enteric coating means that bacteria are released in the intestines, where they can thrive.
FOODS CONTAINING PROBIOTICS
Many parents forget to consider probiotic strains that can be included in the child’s diet to enhance gut bacteria diversity. If you’re choosing a probiotic supplement to provide general support for your child’s immune health or digestive function, please focusing on foods first.
Common foods containing probiotics include yogurt, Kefir, kimchi, sourdough bread, sauerkraut, kombucha, miso, tempeh, fermented vegetables.
YOGURT VS PROBIOTIC
The most common probiotic strains found in yogurt are L. bulgaricus and S. thermophilus. Yogurts labeled with “live active cultures” must contain at least 100 million live active bacteria per gram to meet the standard.
When introducing probiotic foods to your child, the key is to start low and go slow. This helps minimize potential side effects such as bloating and gas. Start with just half a teaspoon every second day and slowly build up from there. To support a healthy gut and encourage microbial diversity, aim to include a variety of probiotic-rich foods in your child’s diet and don’t forget about prebiotics, the fibers that feed those beneficial bacteria.
BOTTOM LINE
There is a growing body of anecdotal evidence supporting the use of probiotics in children. However, the health benefits of probiotics are strain-specific, a strain that may help with one condition could be ineffective for another. Because of this, and the limited amount of high quality research, there is no clear recommendation on whether children should take probiotics routinely, especially for long periods of time.
It’s also important to understand that probiotics are not without risks. Children with compromised immune systems may be at risk for infection, and others may experience side effects such as gas and bloating. In very ill infants, probiotics could potentially lead to serious complications. Always consult your child’s pediatrician before starting any probiotic supplement.
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