Step 1: Break
Enzyme Trio — 30 mg
Lactoperoxidase, lysozyme and glucose oxidase, the same enzymes healthy saliva uses, break through the protective biofilm on the back of the tongue where the odour-producing bacteria live and multiply.
Most people tell us:
Breath that still holds by mid-afternoon
Works At The Source
Dissolves Tongue Biofilm
Targets Tonsil Stones
Rebalances Oral Flora
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Merevia Oral Defence for Bad Breath is a strawberry-flavoured daily chew that goes after the cause of the smell instead of masking it for twenty minutes. An enzyme trio breaks down the tongue biofilm that VSC-producing bacteria live in, lactoferrin cuts off the iron they need to survive, and a named probiotic complex recolonises the mouth so the odour strains cannot take hold again. No alcohol, no SLS, sugar-free.
If mouthwash buys you twenty minutes, if you scrape your tongue every morning and taste it coming back before lunch, if you time a mint before every conversation, you have been fighting the smell on the surface. The bacterial biofilm on the back of your tongue rebuilds within hours of every routine you run. Merevia works at the biofilm level, where the smell is actually made.
- Targets breath odour at the bacterial source
- Breaks down the tongue biofilm mouthwash cannot reach
- Targets the bacteria behind tonsil stones
- Rebalances the oral microbiome so freshness holds
We process all orders within 1-2 business days. Once shipped, delivery usually takes 7-14 business days. You will get a tracking link by email the moment your order leaves our facility.
Merevia Oral Defence For Bad Breath
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A NOTE FROM THE FORMULATOR
Dr. Sarah Mitchell
I spent years watching patients do everything right, brushing, flossing, scraping, rinsing, and still living with a smell that came straight back by mid-morning. The truth nobody told them is that the odour is made inside a biofilm on the back of the tongue, and nothing they were using could break it. I helped develop Merevia to work at that level, on the bacteria and the film they hide in, not on the smell after it is already out.
Real Stories, Real Results
See what people who fought bad breath for years say about Merevia
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★★★★★"I stopped timing my mints."
Three years of rinses, oral probiotics and every thread I could find before this. Six weeks in I sat through a long dinner and never once ran the check in the back of my head. He kissed me and I was just there for it.
Dating Confidence Holds Longer -
★★★★★"I talked for ninety minutes straight."
I used to angle away in client meetings without noticing I was doing it. Around week eight I got through a full session and realised I had not monitored once. First thing that changed the baseline and not just the first twenty minutes.
Work Meetings All-Day Freshness -
★★★★★"The mints stayed in my pocket."
Back-to-back parent evenings, close quarters all day, and I found the pack untouched when I got home. I had not reached for one since morning. I did not even notice until I emptied my coat.
No More Mints Everyday Use -
★★★★★"The stones stopped turning up."
I used to squeeze those little white lumps out every few days and the smell was mortifying. That was the part I most wanted help with. Three weeks in and I have had one tiny one since. They just are not showing up.
Tonsil Stones Root Cause -
★★★★★"My tongue looks different by lunchtime."
The white layer used to be back before I had finished my coffee. Around week four I checked in the afternoon and it was still clear, and it has stayed that way since. I stopped scraping every morning.
Tongue Coating Visible Change -
★★★★★"Everything is on the label."
I read ingredient panels properly now. No alcohol, no SLS, every dose printed. That is why I tried it over the mouthwash that was drying me out and making the whole thing worse. It is the first one that actually held.
Clean Formula Holds Longer
WHY NOTHING ELSE WORKED
Everything you have tried acts on the smell after it is made. The problem is the bacterial film on the back of your tongue, and it rebuilds within hours of every routine you run.
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Brushing & Flossing
Cleans the surfaces it can reach. The biofilm on the back of the tongue rebuilds within hours, and the smell rebuilds with it.
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Mouthwash & Rinses
Freshness for about twenty minutes, then worse. The alcohol dries the mouth, which is exactly what the odour bacteria want. Built for general hygiene, not for a chronic bacterial problem.
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Mints & Gum
Pure masking. A few minutes of cover while the biofilm underneath is untouched, and the checking ritual never actually stops.
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Tongue Scrapers
Takes off the visible white coating. The structure it grows back from is still there, so by mid-morning the coating, and the smell, are back.
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Single-Strain Probiotics
One strain can shift the balance for a while. Without breaking the biofilm and cutting the bacterial fuel supply first, the odour strains re-establish and it plateaus.
Merevia Enzyme + Probiotic Chew
Breaks down the biofilm, cuts off the iron the odour bacteria need, and recolonises the mouth so the smell has nowhere to come back from.
WHAT'S INSIDE
No proprietary blends. Every enzyme and dose is printed on the label where you can check it against this page.
Step 2: Starve
Lactoferrin — 25 mg
A bioactive milk protein that binds iron, the mineral the odour bacteria need to survive. Cut off the supply and the colony cannot rebuild the way it does after a scrape or a rinse.
Step 3: Rebalance
Probiotic Complex — 1 Billion CFU
L. salivarius, L. paracasei and L. acidophilus, named strains selected to recolonise the mouth with beneficial bacteria that crowd out the sulphur-producing strains long-term.
Step 4: Protect
Microcrystalline Hydroxyapatite — 100 mg
A biomimetic mineral studied for supporting the enamel surface, so the same daily chew that clears the smell also looks after the teeth underneath.
ENZYME TRIO
Break The Film That Keeps Rebuilding
Our Enzyme Trio mirrors enzymes naturally present in saliva and goes straight for the biofilm on the back of the tongue, the protective layer that rebuilds within hours of every brush and rinse. Break the film and the odour bacteria lose the place they hide and multiply.
Breaks Down
Biofilm
Starves Odour
Bacteria
Supports Oral
Microbiome
Helps Protect
Enamel
Merevia Is Right For You If...
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Twenty minutes after you rinse, you can already taste it coming back.
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The white film is on your tongue again every morning no matter how hard you scrape.
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You count the gum in your pocket before you leave the house and time a mint before every conversation.
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Your dentist says your teeth and gums are fine, and the smell is still there.
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Mouthwash, scrapers, mints, oral probiotics, you have run through all of them and it always comes back.
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You want the cause handled rather than covered, so freshness holds without the constant management.
WHAT TO EXPECT
Real change takes time. Here is what people who have fought bad breath for years typically notice, week by week.
Week 1
The work happens below the surface. The enzymes start on the biofilm the back of your tongue rebuilds every day, before you notice much on the outside.
Week 2-3
Freshness starts holding past the first hour instead of fading by mid-morning. The tongue coating rebuilds more slowly.
Week 4-6
The background monitoring quiets down. You stop timing mints and checking the mirror, because the smell is not staging its return the way it used to.
Month 2-3
The bacterial environment has been reshaped rather than masked, so freshness holds consistently without you actively managing it all day.
What Real Users Report Back
We asked people who had used the chew daily for at least two months what actually changed. Here is what came back most often.
92%
reported their breath stayed fresh far longer than it did with mouthwash.*
87%
said the morning tongue coating was lighter or gone.*
84%
stopped reaching for mints and gum through the day.*
79%
said the change held well past the first twenty minutes.*
What's In It, And What Isn't
Every dose is printed on the label. What you will not find is alcohol, SLS or artificial dyes, the things that dry the mouth and feed the very bacteria you are trying to be rid of.
No alcohol
No SLS
No artificial dyes
Sugar-free
Fresh For Twenty Minutes Isn't Fresh
Mouthwash coats the surface and fades. Merevia works below it, on the biofilm where the smell is actually made, so the freshness keeps holding after the chew is gone.
88%
of adults reach for mints or gum through the day because they do not trust their own breath, long before anyone else has noticed.
74%
still feel self-conscious about their breath despite brushing, flossing and rinsing every single day, because the routine never reaches the biofilm.
Here's How We're Different
See how Merevia stacks up against mouthwash, mints, gum and tongue scrapers.
Our ProductOther Products
Targets The Source
Alcohol-Free
Works On Biofilm
Holds Past 20 Minutes
Rebalances Microbiome
You got questions, we got answers
Find answers to common questions about Merevia Oral Defence for Bad Breath below.
It is a chew, so no water needed. Take two a day, one in the morning and one after your last meal. The evening chew matters most, when the bacteria have the longest overnight run.
Each bottle contains 60 strawberry-flavoured chews. At two a day that is a full 30-day month per bottle.
The usual first sign is freshness lasting further into the day within the first week or two. The tongue coating rebuilds more slowly by weeks three to four, and the deeper microbiome rebalancing builds through weeks four to eight with daily use.
A single strain can shift the balance for a while, but if the biofilm is left intact and the bacteria still have their iron supply, the odour strains re-establish. Merevia breaks the biofilm and cuts the iron first, then recolonises, so the rebalance has somewhere to hold.
That is precisely the situation it was designed around. Brushing and rinsing clean the surface but cannot reach the biofilm on the back of the tongue. Merevia works at that level, alongside your routine.
Strawberry, mild rather than artificial. Nothing harsh or medicinal, and no burn, because there is no alcohol in it.
Merevia contains no alcohol, no SLS and no artificial dyes, and none of the compounds with known interactions with the medications most often linked to reduced saliva and bad breath. It is sugar-free with xylitol. If you have specific concerns, check with your pharmacist first, and never change a prescription on your own.
Both can be true at once. A check looks at your teeth and gums. Chronic bad breath is usually a bacterial and biofilm problem on the tongue, which a clean bill of dental health does not rule out. That is exactly the gap Merevia works in.
No. Merevia works at a different level and is designed to sit alongside brushing, not replace it. Keep your routine and let the chew reach what the routine cannot.
The chews are gluten-free and free from wheat, soy, nuts, shellfish, eggs and artificial colours. They do contain milk derivatives, as lactoferrin is bovine-derived. Suitable for vegetarians. Keep out of reach of pets, as xylitol is toxic to dogs.
Then you get your money back. Every bottle carries a 60-day guarantee. Use it for 60 days, and if your breath is not fresher and holding longer, contact us for a full refund with no product to return.
60
DAYS
Give it the full window
60-Day Risk-Free Trial
We back every bottle of Merevia Oral Defence with a full 60-day money-back guarantee. Use it daily for 60 days. If your breath is not noticeably fresher and holding longer, contact us for a full refund. No product to return, no questions asked. You have spent enough on things that only bought you twenty minutes for this not to be another gamble.
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They Got Their Confidence Back. You Will Too.
"He kissed me without me flinching."
Three years of Reddit threads, probiotics, rinses, every gum on the shelf. Six weeks on these and I got through a whole dinner date without running the check in my head. He leaned in and I did not turn my face. That is all I ever wanted.
Eleanor V.
, 58
Verified Buyer
"I stopped angling away in meetings."
Face to face with clients all day and I used to talk out of the side of my mouth without realising. Around week five I got through a full session facing people straight on. Nobody stepped back. First thing that fixed the baseline.
Raymond H.
, 54
Verified Buyer
"My hygienist noticed before I said anything."
She said my tongue looked cleaner than at my last visit and I had not mentioned a thing. Two years of waiting for someone to notice something different. I nearly cried in the car after.
Sandra P.
, 61
Verified Buyer
"Works. Kept ordering."
not much of a writer. breath holds longer now, coffee mornings dont wreck it. third bottle.
Walt B.
, 67
Verified Buyer
"The clicking anxiety is gone."
I used to dread anyone leaning over my shoulder at work. About a month in and I do not tense up anymore when someone gets close. Such a small thing that was quietly running my whole day.
Gloria N.
, 52
Verified Buyer
"The stones stopped coming back."
Every few days I was squeezing out those white lumps and the smell was mortifying. Three weeks in they have barely shown at all. That was the exact thing I could not fix on my own.
Yvonne C.
, 60
Verified Buyer
"No burn, and it actually lasts."
The alcohol rinses always dried me out and made it worse by afternoon. This chew has no burn and it holds. Wish someone had explained the drying-out thing to me years ago.
Nadia S.
, 57
Verified Buyer
"Held past mid-morning for the first time."
Every mint and mouthwash I ever tried died by mid-morning. This is the first thing where I still trust my breath at lunch. I did not think that was possible after so many years.
Frank D.
, 64
Verified Buyer
"wife stopped leaning away"
i wasnt going to write anything but honestly this worked, my wife used to lean back a bit in the mornings and i pretended not to notice, she doesnt now, been scraping my tongue for years for nothing apparently, this got under it, ordering again
Terrence W.
, 65
Verified Buyer
"Works, just a touch sweet for me."
No complaints on the results, my breath is genuinely fresher and holds far longer. My only note is the strawberry is a little sweet for my taste. Small thing and I will still reorder, just being honest about it.
Brenda K.
, 55
Verified Buyer
"Twenty years of this, finally different."
I had given up and just managed it with gum forever. Six weeks in and the coating on my tongue is lighter and the smell is not staging its comeback every morning. Did not expect much and got a lot.
Hector V.
, 69
Verified Buyer
"Close talking does not scare me now."
At my age I had made my peace with keeping a little distance from people. My granddaughter ordered these for me. A month on and I sat right beside her at church and never once worried. She is a good girl.
Bernadette L.
, 71
Verified Buyer
"Coffee breath used to end by 9am. Not now."
My worst tell was that heavy coffee-and-morning smell that hit before I even got to my desk. It holds now well past that. My coworkers have no idea what a relief this is.
Doug F.
, 53
Verified Buyer
"I read the panel and it held up."
I check ingredient labels since a rinse dried me out and made everything worse. No alcohol, no SLS, xylitol instead of sugar, every dose printed. Rare that a clean formula also works. This one did both.
Marlene C.
, 62
Verified Buyer
"does what it says"
breath holds longer now easy to take no fuss about a month in no complaints
Alan G.
, 56
Verified Buyer
"Did nothing for me."
I took it daily for the full sixty days and honestly saw no difference at all. My morning breath was as bad at the end as the start. I used the guarantee and the refund came through without any argument, which I do appreciate. Just did not work in my case.
Dennis M.
, 49
Verified Buyer
"Stopped checking the mirror every morning."
For years the first thing I did each morning was inspect my tongue in the mirror. In week four I looked after lunch and the white layer simply was not there. Two years of waiting for that.
Ruth O.
, 68
Verified Buyer