How to choose a whitening toothpaste
Choosing a whitening toothpaste means understanding its active ingredients and their effect on enamel and gums. According to the ADA, most whitening toothpastes remove surface stains with abrasive agents, and some also contain a small amount of peroxide. Four things are worth checking on the label:
What to check on the label
| What to check | Why it matters | What to look for |
|---|---|---|
| Fluoride | Protects against tooth decay | A fluoride toothpaste, preferably with a recognized quality seal such as the ADA Seal of Acceptance |
| Abrasivity (RDA) | An overly abrasive paste can wear enamel and expose the dentin | According to the ADA, an RDA of 250 or less; with exposed dentin or gum recession, a less abrasive paste |
| An ingredient for sensitivity | Tooth sensitivity is a key consideration when whitening | Potassium nitrate or hydroxyapatite, which can reduce discomfort |
| Activated charcoal | Not enough evidence of safety and effectiveness, and concerns about enamel wear (ADA, Brooks 2017) | Not a first choice |
This page deliberately names no brands: the right product depends on your teeth, and these criteria apply to any toothpaste on the shelf, in the US or in Israel.
Abrasivity (RDA) and the ADA Seal of Acceptance
RDA, or Relative Dentin Abrasivity, is a laboratory measure of how much a toothpaste wears down dentin, the softer layer under the enamel.
According to the ADA, toothpastes with an RDA of 250 or less, like every toothpaste carrying the ADA Seal, are considered safe.
250
Maximum RDA for toothpastes carrying the ADA Seal
A product with the ADA Seal of Acceptance has been evaluated for safety and effectiveness when used as directed.
Some pastes market themselves as "whitening" but rely only on strong abrasion, with no whitening ingredient. They can give an illusion of whiter teeth in the short term, but used for a long time they can wear the enamel and actually lead to yellow teeth, as the dentin underneath shows through.
The right combination of ingredients, not the strength of any single one, is what makes a toothpaste both effective and safe.
How whitening toothpastes work: three mechanisms
Whitening toothpastes rely on three main mechanisms: oxidation, controlled abrasion and an optical effect.
Oxidation
Hydrogen peroxide and carbamide peroxide are oxidizing agents that pass through the enamel and break down pigment molecules into smaller, colorless ones. The amount of peroxide in toothpaste is much lower than in professional teeth whitening, so any change is more gradual.
Controlled abrasion
Particles of hydrated silica, calcium phosphate or alumina mechanically remove surface stains without significantly wearing the enamel. Their size and shape are designed to balance stain removal against enamel protection; rounded particles are considered less abrasive than sharp-edged ones. Some pastes also contain enzymes such as papain or bromelain, which help break down the film that holds surface stains.
An optical effect
Some toothpastes contain a blue pigment that settles on the teeth and makes them look less yellow. The effect is immediate but temporary, and the mechanism is completely different from real whitening: nothing changes in the tooth itself.
A whitening toothpaste cannot match professional whitening, in the office or with a laser, but regular use, together with cleanings by a dental hygienist, helps prevent new surface stains.
| Criterion | Whitening toothpaste | Professional whitening |
|---|---|---|
| Contact time | Short (a couple of minutes of brushing) | Longer exposure |
| Concentration of active ingredients | Low | Higher, under clinical supervision |
| Effect | Removes surface stains | Also changes the internal color of the tooth |
Recommended teeth whitening toothpaste: what to look for
The "best" whitening toothpaste is the one suited to your teeth. Rather than a brand, look for the right profile:
- For healthy teeth without sensitivity, a whitening toothpaste with fluoride and a recognized quality seal is usually suitable for daily use.
- If you already have sensitive teeth, a toothpaste for sensitive teeth (for example with potassium nitrate) or one based on an optical blue pigment is a gentler choice.
- With gum recession and exposed dentin, choose a less abrasive paste, and consider one containing calcium sodium phosphosilicate, designed to help seal the tubules in the dentin.
Be wary of exotic or "natural" products without clinical support. If you prefer a natural toothpaste, check that it still contains fluoride, which protects against decay. Charcoal toothpastes have become popular, but according to a review published in the Journal of the American Dental Association, there is not enough clinical and laboratory evidence of their safety and effectiveness, and there are concerns about enamel wear (Brooks JK et al., JADA, 2017). Likewise, pastes with "natural" ingredients such as turmeric or coconut oil lack solid evidence, and their whitening effect is negligible. More on natural teeth whitening. A product with the ADA Seal of Acceptance has been evaluated for safety and effectiveness when used as directed.
Brush twice a day for at least two minutes, paying attention to the areas where stains appear. A mouthwash containing fluoride or cetylpyridinium chloride can add protection against new stains. On the other hand, avoid long-term use of chlorhexidine mouthwash unless your dentist prescribes it, as it can cause brown surface stains.
Examination, treatment plan and price quote
detailed and personalized
During the consultation, Dr Haim Aseriel examines your teeth, explains all the options and gives you a transparent price quote, with no obligation. The clinic is at 12 HaTnufa Street, Jerusalem.
Whitening toothpaste vs professional teeth whitening
Whitening toothpastes are a useful tool for daily hygiene and for keeping your smile bright, but they have limits. If you want a more noticeable or faster result, professional whitening offers higher concentrations of whitening agent, clinical supervision and a plan adapted to you. At the clinic of Dr Haim Aseriel, whitening follows accepted protocols.
Options range from in-office whitening with a higher-concentration gel to at-home whitening with trays custom-made for your teeth. A custom tray spreads the gel evenly and reduces its contact with the gums. The clinic offers both: in-office whitening, without laser, and at-home whitening with custom trays.
Whatever the method, temporary sensitivity is common at the start of whitening, and whitening only works on natural teeth, not on crowns, veneers or fillings (ADA).
Before any whitening, the clinic checks for sensitivity, assesses the gums and enamel, takes X-rays when needed and records your current shade. This identifies problems such as enamel cracks, faulty restorations or gum disease that need treatment first. This approach makes results more predictable and reduces the risk of complications. Consultations are held in English at 12 HaTnufa Street in Talpiot, south Jerusalem; hours: Sun 8:00–19:00 · Mon 9:00–19:00 · Tue–Wed 9:00–21:00 · Thu 8:30–21:00 · Fri 8:00–14:00.
Whitening toothpaste: frequently asked questions
Choose a whitening toothpaste on three criteria: it contains fluoride to protect against decay, its abrasivity (RDA) suits the condition of your enamel, and it carries a recognized quality seal such as the ADA Seal of Acceptance. If you have sensitive teeth, you can choose a paste that also contains a desensitizing ingredient.
Whitening toothpaste works mainly by gentle abrasion: fine particles such as hydrated silica remove surface stains from the teeth. According to the ADA, some whitening toothpastes also contain a low amount of peroxide. Others contain a blue pigment that creates a temporary optical effect of whiter teeth.
Toothpaste does not whiten like a professional treatment because it mainly removes surface stains and stays in contact with the teeth only briefly. Professional whitening uses a higher-concentration peroxide gel for longer, under a dentist's supervision, so it also changes the internal color of the tooth.
Charcoal toothpaste is not recommended as a first choice: a review published in the Journal of the American Dental Association found insufficient evidence of the safety and effectiveness of charcoal-based products, and there are concerns about enamel wear. A fluoride toothpaste with a recognized quality seal is a better choice.
RDA (Relative Dentin Abrasivity) measures how abrasive a toothpaste is to dentin. According to the ADA, toothpastes with an RDA of 250 or less are considered safe, and every toothpaste carrying the ADA Seal meets this limit. If you have exposed dentin or gum recession, ask your dentist about a less abrasive paste.
Sources
- American Dental Association, Toothpastes (Oral Health Topics) – View the page
- American Dental Association, Whitening (Oral Health Topics), 2022 – View the page
- Brooks JK et al., Journal of the American Dental Association, 2017 – View the study
