The White Diet: The 2 Weeks After Whitening Treatment
This page explains the white diet after teeth whitening. Deepcar Dental Care's aftercare advice: a white diet for 2 weeks after treatment, and avoid smoking during treatment. In general, a white diet avoids foods and drinks high in colouring agents. Most clinical studies found diet made no significant difference to whitening, though one 40% hydrogen peroxide trial, above the UK cosmetic limit, found an effect from coffee after whitening.
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Medical disclaimer: This page is for general information only. It does not replace an examination or treatment by a dentist.
This page was reviewed by Dr Ibraheem Ijaz, principal dentist at Deepcar Dental Care, a General Dental Practitioner registered with the GDC under number 301711.
What is the white diet after teeth whitening?
In general, the white diet after teeth whitening means avoiding foods and drinks high in colouring agents. A 2024 systematic review in Dentistry Journal reports that professional guidelines recommend avoiding foods high in colouring agents, such as wine, soft drinks, tea and coffee.
How long does the white diet last at Deepcar Dental Care?
At Deepcar Dental Care, the aftercare advice is a white diet for 2 weeks after treatment. A separate page explains home whitening with custom trays.
Where does the white diet idea come from?
In general, the white diet recommendation during whitening came from an assumption about the enamel surface, a 2026 narrative review in Brazilian Oral Research explains. The assumption was that whitening agents could temporarily alter enamel structure, making it more open to pigment. The review adds that laboratory studies found peroxide gels might increase the roughness and porosity of the enamel surface, which could in theory help chromogens, the colouring compounds in drinks such as coffee, tea or wine, to be absorbed.
The 2026 review says the laboratory effect does not appear to translate into clinically meaningful outcomes. It adds that studies of enamel worn in the mouth have not supported it, likely because saliva plays an important role in reversing enamel surface changes such as roughness and porosity. A science page explains how whitening gel works on teeth.
Which foods and drinks do published sources name as staining?
Coffee, tea and red wine are the drinks the sources on this page name most often. NHS guidance says teeth can become stained or darker because of getting older, regularly having drinks that can stain teeth, such as coffee, tea or red wine, and smoking.
| Food, drink or habit | Named by |
|---|---|
| Coffee | NHS; Oral Health Foundation; guidelines in a 2024 review |
| Tea | NHS; Oral Health Foundation; guidelines in a 2024 review |
| Red wine | NHS; Oral Health Foundation; guidelines in a 2024 review (as wine) |
| Soft drinks | Guidelines in a 2024 review |
| Juice | Clinicians' advice during whitening, in a 2024 review |
| Dark fruits | Tested in a 2015 analysis of whitening and diet |
| Smoking | NHS; Oral Health Foundation; guidelines in a 2024 review |
Enamel studies in the 2024 review also tested grape juice, chocolate milk and soya sauce. Of its 12 laboratory and in-mouth enamel studies, nine found no effect on whitening, one found that only soya sauce affected it, and two found that staining drinks reduced it: cola or coffee during whitening in one in-mouth study, and tea, red wine and cola after whitening in a laboratory study.
What can you eat and drink on a white diet?
The sources on this page describe the white diet by what it leaves out, not by a menu. The 2024 review's authors knew of no earlier study describing a standard diet to follow after whitening. Colour is not the only factor: the review notes that certain acidic foods and drinks can erode enamel, exposing the dentine underneath and increasing the risk of discolouration.
Questions about this treatment? Book online or call the practice.
What does the research say about the white diet?
Most clinical research so far suggests a restricted diet may not improve the result of whitening. A 2024 meta-analysis of five clinical trials found no significant colour difference, during at-home whitening or one month after it, between people on a restricted diet and people exposed to coffee or wine while whitening. The trials followed patients for up to one month afterwards.
A 2025 network meta-analysis of seven clinical studies, rated moderate quality of evidence, found that grape juice, coffee, tea, wine, cola or an unrestricted diet during whitening gave similar colour change to a white diet. A 2015 analysis of five studies found a non-white diet during whitening was not significantly associated with less whitening, with only a weak positive association between whitening and diet in people who drank large amounts of coffee or tea.
A 2020 randomised trial using 40% hydrogen peroxide, a strength above the 6% limit UK law sets for cosmetic whitening, found that coffee or tea during whitening did not affect it, but coffee after whitening did, on one lightness measure. The 2026 review concludes that dietary restriction during whitening is not supported by the available clinical evidence.
Should you avoid smoking during whitening treatment?
Yes, Deepcar Dental Care's whitening aftercare advice is to avoid smoking during treatment. NHS guidance and the Oral Health Foundation both name smoking among the causes of tooth staining, and the 2024 review reports that professional guidelines recommend stopping smoking. Smoking cessation advice is available at the practice.
What happens after the 2 weeks?
The practice's white diet advice covers the 2 weeks after treatment. Longer-term questions have their own pages: one explains what affects how long whitening lasts, and another covers top-ups and caring for your trays.
When should you speak to your dentist?
Speak to your dentist if you are unsure what your aftercare advice allows, or if a side effect bothers you. Sensitivity is possible while whitening, and at Deepcar Dental Care desensitising gel is supplied. NHS guidance lists teeth becoming sensitive to cold or sweet food and drink, sore gums or throat, and white patches on your gums as side effects, and says to talk to your dentist if you have any side effects that bother you. A safety page explains how whitening affects sensitivity and enamel.
Where are the other whitening aftercare pages?
To find the other whitening aftercare pages, browse this section. The main page describes teeth whitening with a dentist.
Frequently asked questions
Can I drink coffee after teeth whitening?
Professional guidelines name coffee among the drinks a white diet avoids, and the evidence is mixed. A 2020 trial using 40% hydrogen peroxide, above the UK's 6% limit for cosmetic whitening, found coffee during whitening did not affect it, but coffee after whitening did, on one lightness measure three weeks later. Ask your dentist what your aftercare advice allows.
Is red wine more likely to stain than coffee after whitening?
In two laboratory studies, yes. On cattle enamel shortly after 35% hydrogen peroxide, above the UK's 6% cosmetic limit, and human teeth after 10% carbamide peroxide, red wine stained; coffee did not. Another 35% study suggested whitening increased wine staining. In a 2024 review, two clinical trials of red wine during 10% or 16% carbamide peroxide whitening found no influence.
Can I drink tea after teeth whitening?
The evidence on tea is mixed. A 2020 trial using 40% hydrogen peroxide, above the UK's 6% limit for cosmetic whitening, and a 2003 laboratory study at 10% carbamide peroxide found tea made no significant difference, but a laboratory study at 10% carbamide peroxide in a 2024 review found staining drinks, including tea, reduced whitening.
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