Real results

WHY YOUR TEETH WILL LOVE IT

What it is

Phthalimidoperoxycaproic Acid (PAP) is a next-generation organic peracid whitening agent. Where hydrogen peroxide releases the free radicals behind enamel erosion and sensitivity, PAP breaks down stains radical-free - no damage to tooth structure.

Why 18%

At 18% concentration, the issa™ gel delivers a professional-grade level of PAP activity - clinically shown to deliver comparable whitening results to hydrogen peroxide, without the associated sensitivity or enamel microhardness reduction.

What the science says

Studies confirm PAP does not erode enamel or reduce surface microhardness - unlike hydrogen and carbamide peroxide gels. It's also highly effective against polyphenol-based stains - the most common discoloration from coffee, tea and red wine.

What it means for you

Maximum whitening results with zero sensitivity, zero enamel erosion and zero compromise - the professional-grade formula that finally makes at-home whitening worth it.

18% PAP

Peroxide-free

What it is

Phthalimidoperoxycaproic Acid (PAP) is a next-generation organic peracid whitening agent. Where hydrogen peroxide releases the free radicals behind enamel erosion and sensitivity, PAP breaks down stains radical-free - no damage to tooth structure.

Why 18%

At 18% concentration, the issa™ gel delivers a professional-grade level of PAP activity - clinically shown to deliver comparable whitening results to hydrogen peroxide, without the associated sensitivity or enamel microhardness reduction.

What the science says

Studies confirm PAP does not erode enamel or reduce surface microhardness - unlike hydrogen and carbamide peroxide gels. It's also highly effective against polyphenol-based stains - the most common discoloration from coffee, tea and red wine.

What it means for you

Maximum whitening results with zero sensitivity, zero enamel erosion and zero compromise - the professional-grade formula that finally makes at-home whitening worth it.

Before

After 6 days

BEFORE & AFTER

Study results

Up to 10 shades whiter teeth in just 6 days.

92% of users report teeth look noticeably whiter, brighter & more even in color.

96% of users report yellow stains on teeth are visibly reduced.

92% of users report tooth discoloration is visibly reduced.

100% of users report no tooth sensitivity or gum irritation.

*Based on 3rd party subjective testing, over a 6-week period.

PREMIUM SKINCARE

Mindful
beauty

Enamel-safe
Causes no sensitivity and does not erode enamel - even for sensitive teeth.
Zero animal ingredients
The formula is 100% vegan - made without any ingredients of animal origin.
Fragrance-free
This formula does not contain any artificial fragrance.
FOREO clean formula
Formulated without our extensive blacklist of harmful ingredients.

HOW TO USE

Simple & easy

STEP 1

Apply gel

Unscrew the top of the issa™ advanced teeth whitening gel syringe & apply a quarter of the syringe to the base of each side of the issa™ teeth whitening device mouth tray (half a syringe in total).

STEP 2

Treat with device

Place the tray in your mouth & press the universal power button to turn on your device. Press the button again to cycle between different modes.

STEP 3

Rinse mouth

Your device will automatically turn off after 15 mins. Once the session is finished, rinse your mouth thoroughly with water. Repeat for 6 consecutive days.

OUR RECOMMENDATION

issa™ Teeth Whitening Set

This gel was made for light - the set is where it finds it. Oral care's first dual LED + sonic device delivers professional-level whitening and dedicated gum care, powered by FOREO's patented Sonic Pulse Technology.

Up to 10 shades whiter teeth. 15 minutes a day, for 6 days is all it takes.

Learn more