Hi Smile Teeth Whitening Strips and Kit Review: Will They Whiten Your Teeth?

Transform your smile with Hi Smile Teeth Whitening. It utilizes PAP + VIO405 light technology for teeth whitening and potential oral health benefits.

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In This Review

What is Hi Smile Teeth Whitening?

Hi Smile Teeth Whitening Strips employ a special proprietary PAP+ formula, and the whitening kit uses the PAP + VIO405 LED light technology. Hi Smile Teeth does not include hydrogen peroxide, which they claim is safer for the teeth and gums.

The manufacturer promises results with the strips in one treatment, and professional level whitening with the kit in 10 minutes. In reality in most likely takes longer, but the formula may help to lighten the teeth and improve oral health.

In this review we’ll look at Hi Smile Teeth Whitening Strips and Kit in detail, and answer all of your most pressing questions. We’ll also give you the opinion and ratings of our team of board-certified dentists to help you decide if this is the brand for you. Read on!

How Does It Rate?

Overall Rating: 3.6
Hi Smile Teeth WhiteningHi Smile Teeth Whitening


Value for Cost

3.5/5Value for Cost



Brand Highlights

  • They promise professional level whitening benefits.
  • The Hi Smile Teeth Whitening products do not contains hydrogen peroxide.
  • The brand has 3 million customers worldwide.
  • The company has a dedicated research and development team of product experts and dentists.

Key Ingredients

  • PAP
  • Hydroxyapatite (HAp)
  • Potassium Citrate
  • Menthol
  • Glycerin


  • Hi Smile Teeth Whitening Strips and Kit may remove stains and discoloration from the teeth.
  • They could be suitable for sensitive teeth and gums.
  • Hi Smile products might replace lost minerals in the teeth.
  • Hi Smile Teeth Whitening Strips promise results in one treatment.
  • These product may reduce plaque and decrease your risk of developing gum disease.


  • You can’t use Hi Smile Teeth Whitening Kit and strips if you have caps, bridges, veneers, implants, or bonded teeth.
  • There’s mixed evidence about the efficacy and safety of PAP.
  • The Hi Smile Teeth Whitening Strips and Kit may work better for some users than others.

About the Brand

The brand manufacturer is Hi Smile, which is an oral care company headquartered in Queensland, Australia and founded by entrepreneurs Nik Mirkovic and Alex Tomic in 2014. They offer a range of oral health products which they sell worldwide.

How Does It Work?

The Hi Smile Teeth Whitening Strips and the gel in the kit contain phthalimidoperoxycaproic acid (PAP) as an alternative to peroxide-based bleaching agents, which promises to whiten the teeth without forming damaging free radicals.

A study by Mauro Pascolutti and Dileusa de Oliveira in Dental Journal (Basel) found support for the safety and effectiveness of phthalimidoperoxycaproic acid (PAP) in whitening the teeth [1].

Is it really safer than peroxide? Board certified dentist Dr Mark Burhenne has his doubts about its safety. He explains,

It’s a bleaching activator, unlike hydrogen peroxide which is an oxidizer… PAP has produced the most damage to teeth compared to all other teeth whitening products… [2].

The formula includes other ingredients which have anti-microbial, anti-inflammatory, and antioxidant properties. As we said in our review of NuBeam, these help reduce inflammation, protect and repair, and kill bacteria in the mouth to decrease plaque and lower the risk of developing gingivitis.

The Hi Smile Teeth Whitening Kit uses VIO405 LED light technology, which is a whitening light with 32 LEDs. The device sends photos into the cell mitochondria to increase levels of ATP.

This provides cellular energy to all of the cells in the body, and may help whiten the teeth, decrease inflammation, and improve oral health.

A study in Open Dentistry Journal by Roche HaywardYusuf Osman, and Sias R Grobler found that in office LED treatment on the teeth led to significantly color change while the at-home gel treatment for 14 more days added limited benefit [3].

HiSmile Teeth Whitening – Are They Safe & Effective?

These are some of the primary active ingredients in Hi Smile Teeth Whitening:

Phthalimidoperoxycaproic Acid (PAP)

PAP is an agent which promises to whiten the teeth with its bleach activating properties, and it’s a common alternative to hydrogen peroxide.

While there is some research showing its safety and efficacy, there’s other evidence against its safe use and whitening benefits. However, one study in Composites Communications by Junyuan Qin showed that a PAP tooth whitening gel was safe and effective [4].

Verdict: The evidence about the safety and efficacy of PAP in teeth whitening is contradictory.

Hydroxyapatite (HAp)

This is an inorganic mineral which exists in the bones and teeth of human beings. It regulates structure and could also help in bone and teeth repair. It provides the teeth with minerals to strengthen them, and helps protect against plaque development.

A study on tooth enamel samples published in the European Journal of Dentistry by Sandra Sarembe, et al concluded that a hydroxyapatite gel was more effective at whitening teeth than mouthwash and water [5].

Verdict: Hydroxyapatite may offer teeth whitening benefits.

Potassium Citrate

Potassium salts like citrate may help reduce teeth and gum sensitivity, according to some studies. However, other research shows it has little benefit in this area. A review published in the Journal of Orofacial Pain by R Orchardson and D G Gillam examined the impact of potassium citrate on decreasing tooth sensitivity and found conflicting data [6].

Verdict: Potassium citrate may help decrease teeth pain and sensitivity, but the results are inconsistent.


Glycerin, as explored in our Arc Teeth Whitening Pen Reviews, is a commonly used ingredient in mouthwashes and toothpaste. Its properties include moisture retention and a soothing effect on oral tissues. Glycerin helps maintain moisture balance in the mouth, contributing to a comfortable and hydrated oral environment.

Hi Smile Teeth Whitening – Frequently Asked Questions (FAQ’s)

Q: How Do I Use Hi Smile Teeth Whitening Strips?

A: You can brush your teeth first to get rid of plaque as we said in our review the Best Teeth Whitening Strips, but make sure your teeth are dry before you use the product. Peel the long strip and place the sticky side along your top teeth.

Then peel the shorter strip and similarly apply it to your bottom teeth. Leave the treatment for 30 minutes, then remove and wash your mouth with water. Each strip lasts for one use.

Q: What is the Return Policy?

A: The manufacturer has a 30 day ‘change of mind’ policy for unopened, unused products. If you want a refund, contact customer service for instructions and send the items back within 30 days of the order. You should get a refund of the full purchase price.

Q: Who Should Buy Hi Smile Teeth Whitening Strips or Kit?

A: These Hi Smile Teeth Whitening products are suitable for anyone who wants to whiten their teeth with an at-home product, but would like to avoid hydrogen peroxide as an ingredient.

Q: Where to Buy It?

A: The Hi Smile Teeth Whitening Strips and Kit are for sale on the official site and from many online retailers like Amazon. You can also buy them in pharmacies and department stores. The price of a packet of strips on the manufacturer’s site is $20, and you can buy the kit with the PAP + VIO405 LED light for 119.20.

Q: What Sets It Apart From the Competition?

A: Unlike other teeth whitening strips and kits, instead of relying on hydrogen peroxide or a related bleaching agent they use phthalimidoperoxycaproic acid as their method. While the manufacturer claims that it is a safer alternative to peroxide, that may or may not be the case as the research is not conclusive on this point.

Hi Smile Teeth Whitening Reviews by Customers

In the opinion of our expert team of dental professionals, Hi Smile Teeth Whitening Strips and Kit do have some merit, but in the end PAP + does not appear to be as effective as hydrogen peroxide in whitening teeth. For this reason, our rating is a mediocre 3.6 stars.

The Hi Smile Teeth Whitening reviews do not offer much more optimism than our team, because on the whole they are not overly good for the Hi Smile Teeth Whitening Kit. For the strips, the feedback is somewhat better.

On Google, 24, 938 customers give the kit a rating of 3.7 stars, and the 279 commenters on Product Review give 2.6 stars. The Hi Smile Teeth Whitening Strips do better on Product Review, with 207 users rating it 4.4 stars. On Trustpilot, 17, 625 people give the Hi Smile brand 2.9 stars.

One of the top 5 star review for the strips comes from Laura M, who says they are a great alternative to peroxide:

I was using the peroxide based whitener from the dentist office when I suddenly developed a reaction to it. I found this product while searching for an alternative and it does an outstanding job of whitening my teeth. I’ve already referred it to a friend!

One the other hand, Zoe gives one star to the strips, kit, and other Hi Smile Teeth Whitening products:

Another Hi Smile product that I unfortunately saw no results after using. I’ve used these in conjunction with the whitening serum, pap+ powder and at-home teeth whitening kit but have seen absolutely no change in the color of my teeth. Disappointed because the brand looks so promising.

Verdict: The customer feedback for Hi Smile Teeth Whitening Strips and Kit is very mediocre, with only some users experiencing great benefits.

Hi Smile Teeth Whitening Review – Conclusion

On the whole, our team of board-certified dentists rates Hi Smile Teeth Whitening Strips and kit a very moderate 3.6 out of 5 stars. While the price is fairly reasonable and the products may provide some whitening and oral health benefits, peroxide-based formulas are likely still more effective and safer.

On the whole, the Hi Smile Teeth Whitening reviews offer a mix of opinions, and the comments and ratings are not overly high. A number of people say the kit in particular did not give them the whitening results as they expected. However, there are a number of positive comments about the benefits of the strips.

Hi Smile Teeth Whitening contains ingredients which should be safe for the mouth and gums if you follow the directions in terms of dosage and treatment time. However, especially if you have sensitive teeth and gums, we do recommend that you check with your dentist first before trying these products.

Our Top Teeth Whitening Products

Verdict on Claimed Benefits: Below is our summary of the available evidence for the claimed benefits of below mentioned teeth whitening supplements, strips, and charcoal powder based on the available research:

ProDentim Oral Probiotics | Healthy Gum Liquid Drops
Supports The Health Of Your Gums*Gold Star Evidence
Helps Your Sinuses Stay Free And Open*Gold Star Evidence
Helps with Inflammation*Gold Star Evidence
Supports Respiratory Tract*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.9
Dentitox Pro | Healthy Gums & Teeth
Soothes and Heals Gums*Gold Star Evidence
Supports Cavity Prevention*Gold Star Evidence
Eliminates Bad Breath*Gold Star Evidence
Reduces Discoloration*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.8
PowerBite | Dental Mineral Complex
Fortifies Teeth and Gums*Gold Star Evidence
Strengthens Oral Defenses*Strong Evidence
Promotes Long-Lasting Fresh Breath*Gold Star Evidence
Gently Removes Surface Stains*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.8

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

Customer Reviews for Hi Smile Teeth Whitening

Hi Smile Teeth Whitening Strips and Kit Review: Will They Whiten Your Teeth?

Customer Reviews & Ratings

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Hi Smile Teeth Whitening
PAP, Hydroxyapatite (HAp), Potassium Citrate, Menthol and Glycerin

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    11 Sources

    We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

    [1] A Radical-Free Approach to Teeth Whitening: https://pubmed.ncbi.nlm.nih.gov/34940045/
    [2] https://askthedentist.com/podcast/What-Is-Pap-And-Is-It-A-Safe-Teeth-Whitening-Method/
    [3] A Clinical Study of the Effectiveness of a Light Emitting Diode System on Tooth Bleaching - PMC (nih.gov)
    [4] A Bio-Safety Tooth-Whitening Composite Gels With Novel Phthalimide Peroxy Caproic Acid: https://www.sciencedirect.com/science/article/abs/pii/S2452213919300191
    [5] In Vitro Whitening Effect of a Hydroxyapatite-Based Oral Care Gel: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7440957/
    [6] The Efficacy Of Potassium Salts As Agents For Treating Dentin Hypersensitivity: https://pubmed.ncbi.nlm.nih.gov/11203743/
    [7] Tooth Whitening: What We Now Know: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4058574/
    [8] Evaluation of Potential Effect of Menthol Solution on Oral Hygiene Status of Dental Students in a University in Iraq: https://www.ajol.info/index.php/tjpr/article/view/116617
    [9] Safety Assessment of Glycerin as Used in Cosmetics: https://journals.sagepub.com/doi/full/10.1177/1091581819883820
    [10] Review of Menthol in Oral Care Formulation as Freshener and Preventing Halitosis: https://ijprajournal.com/issue_dcp/Review%20of%20Menthol%20in%20Oral%20Care%20Formulation%20as%20Freshner%20and%20Preventing%20Halitosis.pdf
    [11] Clinical Efficacy Of Toothpaste Containing Potassium Citrate In Treating Dentin Hypersensitivity: https://www.sciencedirect.com/science/article/pii/S1991790209600234

    **This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

    *Result may vary. The information contained in this website is provided for general informational purpose. No medical claims are implied in this content, and the information herein is not intended to be used for self diagnosis or self treatment of any condition.

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