Everything you want to know about freshening up

No. The sharp twinges people associate with whitening come from hydrogen peroxide, and Mr. Fris doesn't contain any. You'll feel the tray in your mouth, nothing more. Does it still feel unpleasant during those 60 to 90 minutes? Take the tray out and brush your teeth; you can simply try again the next day.

Sensitivity is rare, but can occur because your teeth temporarily become slightly more porous during whitening. This is completely normal and usually wears off by itself within a day.

The two side effects known from whitening — sensitive teeth and irritated gums — are linked to peroxide. The Mr. Fris formula is peroxide-free, so that reaction doesn't occur. What you may notice is the temporary sensitivity described above, and that's gone within a day.

The tray sits over your teeth and not on your gums, so the gel barely reaches them. If you have inflammation or an open sore, wait until it has healed. In doubt because of a condition or an ongoing treatment? Check with your own dentist.

You'll often see a difference after 1 or 2 treatments. You can judge each day whether you're happy and stop as soon as you like the result.

A top-up once every 1 to 2 months is enough to maintain your result. How quickly your teeth discolour again depends on what passes them: coffee, tea, red wine and smoking are the usual culprits.

You'll see a visible result after 2 trays; the rest of the set is maintenance. With that rhythm of once every 1 to 2 months, you get:

• 5 treatments — about half a year
• 10 treatments — about a year

Mr. Fris only works on natural tooth enamel. Crowns, veneers or fillings won't become whiter, but it is safe to use.

No worries. You can try Mr. Fris risk-free for 30 days. All we ask: take a dated before photo and after photo of your teeth. No result? Then you simply get your money back.

Yes, Mr. Fris is gentle and dentist-approved. It contains no harmful chemicals and is safe to use.

No. Whitening products that can damage enamel do so through hydrogen peroxide in high concentrations. Mr. Fris works with Phthalimidoperoxycaproic Acid: it breaks down discolouration without touching the enamel itself.

No, the trays contain no harmful substances. They are gentle, safe and approved by dentists.

Four ingredients, each with its own job:

• Phthalimidoperoxycaproic Acid — active whitening without peroxide, safe for your enamel
• Glycerine — ensures a comfortable fit while whitening
• PVP — helps the gel adhere well to your teeth for optimal effect
• Xylitol — tooth-friendly ingredient that inhibits bacteria and supports your oral health

Peroxide whitens hard and fast, but it's also where the complaints come from: sensitive teeth and damaged enamel. Pierre wanted something he could give his own patients, so he chose a formula that breaks down discolouration without that side effect. It takes one treatment longer, and it's worth it.

In three steps, the same every day:

1. Place the tray. Start with the bottom. Make sure your teeth are dry and gently press the tray on with your tongue. Then place the top one.
2. Let it work. Wear the trays for 60 to 90 minutes and let the whitening formula do its job.
3. Remove & brush. Take the trays out of your mouth and brush your teeth. Repeat daily.

You'll often see a difference after 1 or 2 times.

60 to 90 minutes. Shorter is fine, but then the formula won't work fully; longer adds nothing.

Use one tray a day. You can stop as soon as you're happy with the result, usually after 1 to 2 times.

After whitening, we advise you not to eat or drink anything for 4 hours. This gives your teeth a chance to settle and lets the result set optimally.

Don't. The formula needs 60 to 90 minutes and is then done; a whole night won't improve the result and you could shift the tray in your sleep. Better to pick a moment in the evening when you're at home anyway.

We're a family business and every order is packed with care. You'll receive your parcel within 1 to 3 working days.

Ja, we verzenden ook naar België. Vul hier de levertijd en het tarief in.

Vul hier de verzendkosten of de drempel voor gratis verzending in.

You can try Mr. Fris risk-free for 30 days. Take a clear photo of your teeth before your first treatment and another one afterwards, both dated. If you see no result, you'll get your money back.

Vul hier de retourvoorwaarden in: herroepingstermijn, geopende verpakking en wie de retourkosten draagt.