The one surface your toothbrush was never designed to clean.

Bad breath is not usually a tooth problem. It's a coating problem - and it sits on the single largest, least-cleaned surface in your mouth. Here's what's actually happening, what the research says, and why a brush beats a scraper.

The TUNG Brush cleaning the surface of a tongue

Why it happens

Your tongue isn't smooth. That's the whole problem.

Under magnification the tongue's surface is a landscape of tiny crevices. Food debris, dead cells and anaerobic bacteria settle into them and form a coating. Those bacteria release volatile sulphur compounds - the gases behind the smell. Rinsing doesn't shift the coating. A toothbrush skims it. It needs to be lifted out.

31.8%

of adolescents and adults are estimated to have halitosis - roughly one in three people.

Silva et al., Clinical Oral Investigations, 2018 (95% CI 24.6-39.0%)

80-90%

of bad breath originates inside the mouth - not the stomach, not the sinuses.

Frontiers in Oral Health, 2023

43%

of halitosis cases in one clinical study traced back to tongue coating - the single most common cause.

Frontiers in Oral Health, 2023, citing an observational study

Scraper vs brush

A scraper works across the surface. TUNG works into it.

That's the entire difference, and it's the reason people who've given up on tongue cleaning tend to get a different result here. Short, firm bristles reach into the texture; a flat edge can only travel over it.

Reaches into crevices
No

Comfortable at the back
Gags

How the options compare.

	Toothbrush	Metal scraper	TUNG Brush & Gel
Reaches into the crevices	✕	✕	✓Short, firm bristles
Comfortable at the back	✕	✕	✓Low-profile head
Neutralises odour compounds	✕	✕	✓With TUNG Gel
Made for the tongue	✕	✓	✓
Easy to stick with	✕	✕	✓

Comparison reflects product design and the mechanism described in the sources cited on this page. Individual results vary.

The evidence

What the research actually says.

The honest version, not the oversold one.

✓

Well supported

Most bad breath starts in the mouth, often on the tongue
Tongue coating is linked to the sulphur compounds behind the smell
Cleaning the tongue reduces those compounds
A purpose-built cleaner edged out a toothbrush in trials

Cochrane review (Outhouse et al.); Frontiers in Oral Health, 2023.

What we won't claim

"Clinically proven" - the trials are small and short
That it cures bad breath for everyone
That it replaces brushing, flossing or your dentist

Breath that won't shift? It can point to gum disease or another cause. See your dentist.

How to use it

Twenty seconds, once a day.

Start after brushing

Apply a small amount of TUNG Gel to the brush. Your mouth is already clean, so you're not just moving debris around.

Brush front to back

Short strokes, light pressure. Start mid-tongue for the first few days and work further back as you get used to it - this is how you avoid gagging.

Rinse and dry

Rinse the brush thoroughly under running water and let it air dry, the same as a toothbrush.