There are a few supplements that I will never go without. One of them saved us from a complete health spiral a few years ago. I was a Mother at the point of pulling my hair out. Both my children were experiencing recurring strep throat infections and dental cavities. I was spinning my wheels trying to understand why. It didn’t matter what I did. These infections and cavities kept coming. I knew I had to figure it out and spent months trying different solutions, meeting with doctors and dentists. After desperately trying to find out why my otherwise healthy children were experiencing this, I was at the end of my rope. Until I discovered a very specific probiotic strain. In this post, I will be sharing all about BLIS K12 oral probiotic benefits. Read on to understand why this simple supplement has changed our family’s health trajectory for the better.
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* Information in this post is not professional medical advice and should not be relied on or used in place of consultation with healthcare professionals. Should you have any medical questions, please consult your primary healthcare provider. **
Our Story: Recurring Cavities and Strep Infections
As with anything, I landed on the research behind oral probiotics due to our own health experiences in our home. I grew up with recurring strep infections as a child. I had fully expected my kids to experience the same issues and thought we were free and clear until my eldest turned 7 years old. All of a sudden both of my children were experiencing dental decay and cavities at every visit. This was about the same time my children were also experiencing recurring strep infections. At the time I didn’t realize these two things were related. I just knew I needed solutions for both.
Searching for Holistic Solutions to Cavities and Strep
I was going down every rabbit hole hoping to find a natural solution to repeat strep. Strep infections are hard on the body, they often start hiding out in biofilms in the body and wreaking havoc elsewhere. There are also many incidences of Children experiencing neurological symptoms following strep infections called PANDAS. I was trying to avoid the route where tonsillectomy is the final solution. This was the solution for myself as a child, and while it did stop the frequency of strep for me, it did not eliminate it. I also prefer to avoid major surgery and general anesthesia if possible.
I found a number of solutions, but they were not working. My kids continued the cycle of catching strep every month or two. I was about ready to pull out my hair. It wasn’t until I landed on a body of research that detailed the benefits of Oral probiotics, specifically BLIS K12 strain. I had never heard of this type of probiotic before and I was intrigued. Turns out, it was the solution we needed. Ever since we’ve implemented these into our routine, we have had ZERO cavities and strep infections for the last 2-3 years. To say it was a relief is an understatement. So, why and how did this work? Let’s dig in.
What are Oral Probiotics?
Oral probiotics are beneficial bacteria that naturally live in your mouth and help maintain a healthy balance within the oral microbiome. Unlike traditional probiotics that target gut health, oral probiotics are specifically designed to support the mouth, throat, and upper respiratory tract. They work by crowding out harmful bacteria, producing protective compounds, and promoting a more resilient environment against issues like cavities, gum disease, and recurring throat infections.
By introducing targeted strains—such as BLIS K12—oral probiotics can strengthen your mouth’s natural defenses and support long-term oral wellness.
What is the BLIS K12 Oral Probiotic strand?
BLIS K12 is a scientifically researched strain of Streptococcus salivarius, one of the first beneficial bacteria to colonize the mouth and throat from birth. What makes BLIS K12 unique is its ability to naturally crowd out harmful microbes by producing powerful antimicrobial peptides known as salivaricins. These compounds help maintain a healthier balance in the oral microbiome, supporting defenses against issues like bad breath, cavities, and recurring strep-related throat infections.
Because BLIS K12 is designed to thrive specifically in the oral cavity—not the gut—it offers targeted, long-lasting benefits for oral and upper respiratory health when consistently consumed.
Why are some people naturally deficient in BLIS K12?
Although Streptococcus salivarius is one of the earliest bacteria to colonize the mouth, not everyone naturally develops high levels of the BLIS K12 strain. Our early microbial exposure—especially during infancy—plays a major role in determining which beneficial bacteria populate the oral cavity long-term. Factors like genetics, mode of birth (C-section vs. vaginal delivery), reduced exposure to diverse microbes, and frequent antibiotic use can all limit the presence of BLIS K12.
Modern lifestyle habits, including highly processed diets and overuse of antibacterial products, may further disrupt the oral microbiome, making it harder for beneficial strains like BLIS K12 to thrive. As a result, some people grow up with an oral environment less protected against harmful bacteria, increasing the risk of cavities, bad breath, and recurring strep infections.
BLIS K12 Oral Probiotic Benefits
The BLIS K12 oral probiotic strain offers a range of targeted benefits that support both oral and throat health. One of its key advantages is its ability to crowd out harmful bacteria associated with cavities, gum issues, and chronic bad breath by producing natural antimicrobial compounds called salivaricins. BLIS K12 also helps reduce the frequency and severity of recurring strep throat infections by creating a more resilient environment in the mouth and upper respiratory tract. Many users report:
- fewer sore throats
- improved breath freshness
- eliminates halitosis (chronic bad breath)
- fewer cavities
- better overall gum and dental health
- sick less often during cold and flu season
- a more balanced oral microbiome after consistent use
- reduction in issues like tonsil stones
- less ear and throat infections
- provides protection from bacterial illnesses during travel, school, daycare or other areas where transmission is higher
- boosted overall immune functions in the Ears, Nose and Throat region (ENT function)
Because BLIS K12 colonizes the mouth rather than the gut. It delivers precise, long-lasting protection where it’s needed most—helping promote stronger, healthier oral defenses over time.
Oral Probiotic Tablets with BLIS K12
How to take BLIS K12 Oral Probiotics
One of the best parts about Oral probiotics with BLIS K12 is how easy they are to take. They are typically very tasty and come in a tablet form. These tablets are often dissolvable so they remain in the oral cavity. You simply keep them in your mouth and let it melt till gone. This allows the probiotic to colonize the ears, nose and throat area.
They typically do not contain sugar so they can be taken after brushing your teeth. In fact, it is often advised to take it after so you allow the probiotic strain to remain in the mouth. We take them each night before bed and keep the bottle beside tooth brushes.
Where to Buy Oral Probiotics BLISK12
There are a number of oral probiotics on the market. Some are different strains that don’t necessarily target the same issues. Be sure to check that the strain contains the BLIS K12 strain on the back. I’ve included two affordable oral probiotics below, both of which we have used in our home.
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