Short answer: a mint strip is a paper-thin, sugar-free film — roughly the size of a postage stamp — that dissolves on your tongue in about 10 seconds and releases mint flavour and a cooling sensation. Because each strip weighs a fraction of a gram, it contributes practically nothing in calories, and because it is sugar-free, it freshens without feeding the bacteria linked to bad breath. A Freegrin box holds 12 pocket packs × 20 strips = 240 strips for $9.99, and the fresh feeling from one strip typically lasts around 20–30 minutes.
This guide explains what is actually inside a mint strip, why it dissolves so fast, what “sugar-free” means in practice, how mint, peppermint and spearmint differ, and how to use strips sensibly. If your question is simply “do they work?”, start with our main guide, do breath strips actually work?; this article goes one level deeper into the strip itself.
What is a mint strip?
Mint strips (also called breath strips, and in the UK often “mouthwash tablets”) are edible films. The idea comes from oral dissolving films used to deliver flavour or ingredients without water: a very thin sheet is cast from a liquid mix, dried, cut into stamp-sized pieces and packed in a slim case. Put one on your tongue and saliva breaks the film down in seconds. There is nothing to chew, spit out or wash down, which is why strips work in a meeting, on a train or in a car when a rinse is impossible.
What’s inside a mint strip
Recipes differ by brand, and you should always read the ingredient list on your own pack, but most mint strips are built from the same five families of ingredients:
1. A film former
This is the “paper” of the strip — usually a plant-derived polymer such as pullulan (made by fermenting starch) or a modified starch or cellulose. Its only job is to hold everything together as a sheet and then dissolve cleanly in saliva. It is flavourless on its own.
2. Mint flavour and cooling agents
The taste comes from essential oils and flavourings — peppermint oil, spearmint oil or a blended “mint” — and the cold feeling comes from menthol or menthol-like cooling agents. Menthol does not lower the temperature in your mouth; it triggers the same nerve receptors that respond to cold, which is why a strip feels icy without being cold.
3. Sweeteners (sugar-free)
“Sugar-free” means the sweetness comes from non-sugar sweeteners rather than sucrose or glucose. Common choices are sugar alcohols such as xylitol or sorbitol, or high-intensity sweeteners such as sucralose. The practical point: these do not feed the bacteria that produce sulphur compounds, so a strip freshens without adding fuel for the problem it is masking. Freegrin strips are sugar-free across all five flavours.
4. Plasticisers and texture helpers
Small amounts of glycerine or similar ingredients keep the film flexible so it does not crack in the pack, plus a little emulsifier so the flavour oils spread evenly through the sheet.
5. Colour
A trace of food colouring gives mint strips their green or blue tint; it has no effect on freshness.
What is not in a typical mint strip: sugar, water (the film is dried), alcohol (unlike many liquid mouthwashes) and any abrasive. That is also why a strip cannot clean your teeth — it freshens the surface of the mouth and masks odours; it does not remove plaque.
Sugar-free and calories: what the label really means
A single strip weighs a fraction of a gram. Even a strip sweetened with a sugar alcohol contains such a small amount that the energy per strip is negligible — a few strips a day are not going to register in anyone’s diet. That said, “sugar-free” is not the same as “ingredient-free”: if you follow a strict diet, avoid particular sweeteners, or are managing your intake of sugar alcohols (which can be laxative in large amounts), check the list on the pack. Freegrin strips are also vegan-friendly.
The bigger benefit of sugar-free is dental, not calorific. Sugary mints and gum leave sugar in the mouth for minutes at a time; a sugar-free strip does not, so it is the safer everyday choice for people who freshen up several times a day.
Mint vs. peppermint vs. spearmint: which strip should you pick?
| Flavour | Character | Cooling strength | Best for |
|---|---|---|---|
| Mint | Balanced, classic cool mint | Medium | Most people; first box |
| Peppermint | Bold, sharp, bracing | Strong | After coffee, smoking or garlic; people who want to feel it |
| Spearmint | Softer, sweeter, less icy | Mild | Sensitive palates; between meals |
All three are sugar-free and dissolve the same way; the difference is the oil blend and how much cooling agent is used. Peppermint carries more menthol, which is why it feels strongest. If you cannot decide, the breath strips range includes a variety 3-pack, and our flavour guide compares all five, including strawberry and watermelon.
How to use a mint strip (and how many is sensible)
- With a clean, dry finger, take one strip from the pack and close the pack straight away so the others stay dry.
- Place it flat on top of your tongue, not on the roof of your mouth.
- Close your mouth and let it dissolve on its own — no chewing, no swallowing it whole. About 10 seconds.
- Wait a moment before drinking, so the flavour is not washed away.
One strip at a time is enough for most people. There is no official daily limit, but two to five a day is a normal pattern; if you find yourself reaching for ten or more, that is a sign the underlying cause of the odour needs attention rather than more masking — see how many breath strips a day is too many and, for the causes themselves, how to get rid of bad breath naturally.
What a mint strip can and cannot do
A strip is a freshener. It masks food and drink odours, leaves a clean cool finish and is the most discreet option available. It is not a toothbrush, floss or a treatment for persistent bad breath, and it does not contain fluoride. Use it as the top-up between proper cleaning, and if bad breath persists for weeks despite good daily cleaning, see a dentist. For where strips sit against liquid rinses and mints, read breath strips vs. mouthwash.
Frequently asked questions
What are mint strips made of?
Typically a plant-derived film former such as pullulan or modified starch, mint flavour oils and a cooling agent like menthol, sugar-free sweeteners, a little glycerine for flexibility and a trace of colour. Read your own pack for the exact list.
Are mint strips sugar-free?
Freegrin mint strips are sugar-free across all flavours, sweetened without sucrose or glucose, so they freshen without feeding odour-causing bacteria. Not every brand is, so check the label.
Do mint strips have calories?
A strip weighs a fraction of a gram, so the energy per strip is negligible — a few a day will not register in a normal diet. They are not, however, a substitute for reading the ingredient list if you follow a strict diet.
How long does one mint strip last?
The strip dissolves in about 10 seconds; the fresh feeling is strongest for the first few minutes and fades over roughly 20–30 minutes, longer over a clean mouth and shorter after coffee or garlic.
Are mint strips the same as “mouthwash tablets”?
In the UK, yes in everyday use: on TikTok Shop UK the same Freegrin strips are listed as “Freegrin Mouthwash Tablets”. They are dissolvable films, not chewable tablets and not a rinse.
Try them
Start with a box of Mint Breath Strips — 12 pocket packs, 240 strips, $9.99, sugar-free and vegan-friendly — or step up to Peppermint if you want the strongest cooling. Tracked shipping from our Hong Kong or Germany warehouse and 30-day returns on unopened boxes.
Breath strips are a freshening product, not a treatment. Persistent bad breath is best addressed with thorough daily cleaning and, if it continues, a dentist.