OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics

The oral microbiome lozenge

OS-01® Oral Probiotics

4.7  · 1,250+ verified reviews

Built on 20+ years of BLIS clinical research. The only oral probiotic with all four pillars: K12 + M18 + prebiotic + zinc.

The complete oral microbiome restoration system. Slow-dissolve lozenges that target the tongue and throat — where 90% of breath odor actually originates. Designed to restore the ecosystem, not mask the smell.

Title

Mornings that don't start with dread

Gentle on mouth- no burn, no dryness

Restoration, not masking for hours

Conversations you can lean into

90-day guarantee

Fast shipping

Made in USA

90-day guarantee

  Fast shipping

Made in USA
Title

Benefits

Restores Breath at the Microbial Source

Most products kill bacteria indiscriminately. Fresora restores the protective strains — clinically studied BLIS K12™ + BLIS M18™ — that suppress odor-producing bacteria naturally. This is why the freshness lasts hours, not 20 minutes..

 

Built for Mouth Survival, Not Stomach

90% of oral probiotics dissolve in stomach acid. Fresora's slow-dissolve format releases the strains directly onto your tongue and throat for 5–7 minutes — exactly where breath odor originates and colonization needs to happen.
 

The Only Full-Stack Formula

K12 alone doesn't work. M18 alone doesn't work. We've watched the entire category prove this for a decade. Fresora is the only oral probiotic that delivers strains + prebiotic (to keep them alive) + zinc citrate (to neutralize sulfur compounds). All four pillars. One lozenge..
 

Designed for Restoration, Not Masking

A 90-day protocol because microbiome restoration takes time. Most users report changes in morning breath within 5 days. Full ecosystem restoration takes 60–90 days. Masking is what's quick.

 

Ingredients

S. salivarius BLIS K12™ — 1 Billion CFU

The most-studied oral probiotic strain. Produces targeted antimicrobials (BLIS) that suppress odor-causing bacteria.

 

S. salivarius BLIS M18™ — 1 Billion CFU
Targets the back of the mouth and gum line. Reduces volatile sulfur compound production at the source.

 

Inulin (Prebiotic Fiber)
Keeps K12 and M18 alive long enough to colonize. The reason most single-strain probiotics fail.

 

Zinc Citrate
Neutralizes the volatile sulfur compounds already present. Immediate freshness while strains rebuild the ecosystem.

 

L. reuteri + L. paracasei Blend
Secondary support strains for broader oral microbiome balance.

 

Natural Peppermint
Mild, no burn, no chemical aftertaste.

Title

Other: Xylitol, Isomalt, Natural Mint Flavor, Magnesium Stearate, Stevia.

The science behind oral probiotics has been covered by:

Independent research on BLIS K12 and M18 has been published in over 40 peer-reviewed studies since 2003.

01

Restores the microbiome

The full ecosystem, not just one strain. K12 + M18 + prebiotic + zinc working together.

 

02

Built for the mouth

Slow-dissolve format delivers strains directly to the tongue and throat — where breath odor originates.

03

5 days to first signal

Most users notice changes in morning breath within 5 days. 

04

Conversations you lean into

The real outcome isn't fresh breath. It's the return of the version of you who didn't think about it.

See Clinical Evidence →

First days

A fresher mouth feeling and noticeably milder morning breath. The clinically studied K12 strain begins suppressing odor-producing bacteria within 48 hours of consistent use.

After 1–2 weeks

Noticeably cleaner-feeling teeth, healthier mouth comfort, and breath that stays neutral 4–6 hours longer than baseline. Coffee and dairy stop triggering the same rebound.

After 1-3 month

Sulfur compound production has dropped sharply. K12 and M18 have colonized. You stop checking your breath as often. Most customers stop carrying mints by day 30.

After 3-6 months

Full microbiome restoration. Neutral breath all day, without effort. The hypervigilance loosens. You forget you used to think about your breath constantly.

Why Fresora works (when Other probiotics don't).

The full four-pillar stack

K12 + M18 + prebiotic + zinc. Most oral probiotics give you one of these. We're the only one that delivers all four — because all four are required.

Slow-dissolve delivery to the mouth

90% of oral probiotics are capsules that dissolve in stomach acid. Fresora releases the strains for 2–3 minutes directly onto your tongue and throat — where breath odor originates.

Built around BLIS research, not marketing

20+ years of peer-reviewed research on K12 and M18. We didn't invent them — we built the first delivery system that uses them correctly.

Designed as a 90-day protocol

Restoration isn't instant. We built Fresora as a 3-month protocol because rebuilding a microbial ecosystem takes 60–90 days. Masking is what's quick.

8B

CFU per dose · clinically studied K12 + M18 blend

100%

Active strains delivered where colonization happens — your mouth, not your stomach

2–3 min 

Slow-dissolve time on tongue. Most products dissolve in 30 seconds.

$0.7/day

Less than a stick of gum. And actually rebuilds something underneath.

they say it better than we do.

Excellent 4.7

1,250+ verified reviews

"I noticed my breath staying fresh for hours — even after coffee. But what surprised me most? I stopped worrying about it."

Ashley N.

· Verified customer

· 11/08/2024

· 4.8/5 from 1,250+

verified reviews

Most probiotics don't work in the mouth. Fresora does.

The only oral probiotic with K12 + M18 + prebiotic + zinc. Built for the tongue and throat, not the stomach.

Start the  protocol · Save 34%

How Fresora compares.

Pick what you've already tried. We'll show you what each one misses.

Fresora Mouthwash
Lasts ✓ ✕
Restores good bacteria ✓ kills them
Prebiotic to keep strains alive ✓ —
Zinc to neutralize sulfur ✓ sometimes
Slow-dissolve to mouth ✓ ✕
Helps dry mouth ✓ worsens
Builds toward restoration ✓ ✕
Fresora Mints / Gum
Lasts ✓ ✕
Restores good bacteria ✓ ✕
Prebiotic to keep strains alive ✓ —
Zinc to neutralize sulfur ✓ ✕
Slow-dissolve to mouth ✓ ✕
Helps dry mouth ✓ ✕
Builds toward restoration ✓ masks only
Fresora Single-strain
Lasts ✓ unreliable
Restores good bacteria ✓ partial
Prebiotic to keep strains alive ✓ ✕
Zinc to neutralize sulfur ✓ ✕
Slow-dissolve to mouth ✓ stomach
Helps dry mouth ✓ ✕
Builds toward restoration ✓ partial
Fresora TheraBreath
Lasts ✓ hours
Restores good bacteria ✓ ✕
Prebiotic to keep strains alive ✓ —
Zinc to neutralize sulfur ✓ ✓
Slow-dissolve to mouth ✓ ✕
Helps dry mouth ✓ partial
Builds toward restoration ✓ ✕

Fresora is the only oral probiotic that delivers all four restoration pillars — strains, prebiotic, zinc, and slow-dissolve format — in a single lozenge.

How to take it

Take 2 lozenges nightly 

 After brushing for best absorption.

Let it dissolve slowly

2–3 minutes on the tongue. Don't chew or swallow whole — the slow release is what makes it work.

Skip water for 15 minutes after

Let the strains stay where they need to be — on your tongue and throat.

Use daily for 90 days 

Restoration is a protocol, not a one-off. Skipping days slows colonization.

A 90-day protocol built for restoration — not masking.

Because rebuilding a microbial ecosystem takes time. Five days for the first signal. Ninety for full restoration.

The four-pillar formula

The four things missing from your mouth.

Most oral probiotics give you one. Fresora is the only formula with all four — because all four are required for restoration.

Clinically studied probiotics

K12 + M18: the two most-studied strains for reducing sulfur-producing bacteria.

 

Inulin prebiotic fiber

Keeps the probiotic strains alive long enough to colonize. The pillar most products miss.

Zinc citrate

Neutralizes the volatile sulfur compounds already present in the mouth.

Slow-dissolve technology

2–3 minute release directly to the tongue and throat — where breath odor originates.

Restores your oral microbiome at the source.

Frequently Asked Questions

The actual questions our customers ask before they buy.

I've tried ProDentim, Hyperbiotics, every probiotic on Amazon. Why would this be different?

Single-strain probiotics fail for one mechanical reason — no prebiotic to keep the bacteria alive long enough to colonize. Fresora is the only oral probiotic that delivers K12, M18, prebiotic, and zinc together. That combination is what makes restoration actually happen.

My dentist said my mouth is healthy. Why do I still have bad breath?

Your dentist checks for cavities, plaque, and gum disease. They don't measure the microbial balance on your tongue and throat — which is where 90% of breath odor originates. Two different specialties.
 

How long should I take it?

The full restoration protocol is 90 days. Most customers continue with one bottle per month after that as maintenance. K12 and M18 are among the most-studied probiotic strains for long-term safety.

When will I feel results?

Morning breath typically improves within 3–5 days. Sulfur compound reduction is noticeable in 1–2 weeks. Full microbiome restoration takes 60–90 days. Severe chronic cases may need the full 3-month protocol to see complete change.

Does it work if I have tonsil stones?

Tonsil stones are related — they form when bacteria and debris collect in tonsil crypts. Fresora's strains reduce the bacteria that cause stone formation. Most customers with mild-to-moderate stones see them reduce over the first 30 days.

Does it work if my bad breath comes from my stomach?

True gut-origin bad breath is rarer than most people think. Most "stomach breath" is actually oral-origin odor that returns after eating because the meal disrupted the microbial balance. Restoring oral balance resolves both perceived causes.

Can I take it long-term?

Yes. K12 and M18 have decades of safety research behind them. Many customers continue with one bottle per month after the 90-day protocol as maintenance.
 

Does it replace my mouthwash?

Yes — and you should let it. Antimicrobial mouthwash kills the same protective bacteria Fresora is restoring. Using both undermines the protocol.

Are there any side effects?

Fresora is gentle and well-tolerated. No burn, no dryness, no irritation. Rarely, some customers report mild changes in saliva consistency during the first week as the microbiome shifts — this is the colonization process and resolves on its own.

We stand by our science.

90-day money-back guarantee

If Fresora doesn't measurably improve your breath, request a full refund within 90 days. Keep the jars. No forms, no questions, no inspection. The protocol works or you don't pay.

Science-backed formula

Built around BLIS Technologies' two-decade research program on oral probiotic strains. Made in the USA in cGMP-certified facilities.

Free US shipping

All orders ship within 24 hours from our US fulfillment center. Standard delivery in 3–5 business days.

Talk to a specialist

Our team responds to questions within 4 hours, 7 days a week. Real humans, real answers, no scripts.
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics
OS-01® Oral Probiotics

OS-01® Oral Probiotics

$39.90