Key Takeaways
-
Oral probiotics use S. salivarius strains that are native to the mouth, whereas gut probiotics use strains like Lactobacillus meant for the intestines.
-
Oral probiotics must be delivered as lozenges to allow the bacteria to physically colonise the mouth and throat.
-
Strains like BLIS K12® and BLIS M18® produce natural antimicrobial substances called BLIS (Bacteriocin-Like Inhibitory Substances) to actively crowd out harmful bacteria.
-
Unlike gut probiotics, oral probiotics focus on protecting the mouth - including the throat, tooth enamel, gums, and the upper respiratory tract.
Most people are familiar with the benefits of probiotics for digestion. You likely know that fermented foods and capsules can help balance your gut. However, there is a common misconception that all probiotics are the same. In reality, the bacteria in your mouth require a completely different approach than the bacteria in your stomach.
So, how do oral probiotics work? Unlike traditional probiotics that are swallowed and act in the gut, oral probiotics are designed to dissolve in the mouth, allowing beneficial bacteria to colonise the oral cavity. These strains help balance the oral microbiome by competing with harmful bacteria, supporting healthy gums, fresher breath, and overall oral and general health.
Understanding the distinction between these two systems is the key to managing your "gateway to health." While gut probiotics focus on what happens after you swallow, oral probiotics are designed to protect you from the very first breath.
The Biological Geography Of Your Microbiome
Your body is home to several distinct "neighbourhoods" of bacteria. The types of microbes that thrive in the acidic, low-oxygen environment of your gut are very different from those that live on your teeth, tongue, and tonsils. This is the primary reason why oral probiotics work differently to gut probiotics.
Gut probiotics are generally formulated as capsules or drinks. Their main goal is to survive the harsh transit through your stomach acid so they can reach the intestines. Once there, they assist with digestion and internal immune function.
Oral probiotics have a different mission. They need to inhabit the moist, oxygen-rich surfaces of your oral cavity. To understand the foundations of this system, you can read our guide on what oral probiotics are and how they function as your body's first line of defence.
Strain Specificity: The Right Tool For The Job
The most significant difference lies in the specific strains used. Most gut-focused supplements use Lactobacillus or Bifidobacterium. While these are excellent for digestion, they are not native to the oral cavity and will simply not colonise and thrive there.. Effective oral probiotics use strains of Streptococcus salivarius, such as BLIS K12® and BLIS M18®. These are the natural colonisers of a healthy mouth. These strains do more than just take up space.. They are termed ‘advanced’ probiotics because they are capable of not only colonising with their good bacteria they also crowd out the harmful bacteria that cause issues like bad breath or sore throats. Not all probiotic strains have this ability.
For example, you can learn about the benefits of dental probiotics and the BLIS M18® strain to see how they specifically protect your enamel by promoting a neutral pH level.
Why Delivery Methods Matter: Lozenges versus Capsules
The way you take your supplement is just as important as the bacteria inside it. If you swallow an oral probiotic lozenge like a pill, you lose most of the benefits. For these beneficial bacteria to work, they must physically attach to your oral tissues. This is why oral probiotics are almost always delivered as a slow-release lozenge or powder.
As the lozenge dissolves, billions of beneficial bacteria are released into your saliva. Your saliva then carries them into the nooks and crannies of your teeth and the deep crypts of your tonsils. This "contact time" is what allows for successful colonisation.
Oral probiotics target very specific health outcomes. While gut health is linked to things like regularity and mood, oral probiotics and their contribution to oral health focus on preventing plaque build-up, protecting gums, and supporting the throat's immune response.
Fighting Bad Breath At The Source
Many people use gut probiotics hoping to fix bad breath. They often think the smell comes from their stomach. While digestion can play a role, over 90% of bad breath starts in the mouth.
Anaerobic bacteria hide on the back of the tongue and produce foul-smelling sulphur compounds. Because gut probiotics bypass the mouth, they cannot reach these bacteria. Oral probiotics are specifically designed to fight bad breath by rebalancing the microbiome. They crowd out the odour-causing strains and replace them with fresh-smelling, beneficial bacteria.
Targeted Protection For Your Daily Routine
You do not have to choose between gut health and oral health. A complete wellness routine often includes both. However, you need the right products for each area.
-
For Throat and Immune Support: ThroatGuard® PRO is an ideal choice. It provides a concentrated dose of BLIS K12® to keep your upper respiratory system resilient against seasonal challenges.
-
For Teeth and Gums: ToothGuard® is specifically formulated with BLIS M18®. It helps to reduce plaque build-up, supports gum health and maintains a healthy pH to protect your enamel.
-
For Fresh Breath: The FreshBreath Kit combines BLIS K12® lozenges with a specialised mouthwash, tongue scraper and instructions. It targets the "bad" bacteria that cause volatile sulphur compounds, giving you a long-term solution for halitosis.
Rebalance Your Microbiome From The Start
Your health journey begins in the mouth. By using targeted oral probiotics, you are protecting the entrance to your entire body. Whether you want to support your immune system or keep your smile healthy, the right strain makes all the difference.
Shop the BLIS Probiotics® range to find the specific support your mouth and throat deserve.
FAQs
Can I take oral and gut probiotics at the same time?
Yes. They target different areas and use different strains, so they will not interfere with each other. Using both ensures you are supporting your microbiome from the entrance of your body all the way to your digestive tract.
How long do oral probiotics stay in the mouth?
Oral probiotics are transient. This means they will eventually be washed away by food and drink. Daily use is recommended to keep the population of beneficial bacteria high enough to protect your teeth, gums, mouth and throat effectively.
Will gut probiotics help my teeth?
Generally, no. The strains used in gut probiotics are not designed to colonise the mouth or stick to tooth surfaces. For dental protection, you need oral-specific strains like BLIS M18®.
What is the best time to take an oral probiotic?
The best time is after brushing your teeth at night. This gives the lozenge time to dissolve and the bacteria several hours to colonise your mouth while you are asleep and your saliva flow is at its lowest.
