For 48 hours after laser teeth whitening, stick to white or light-coloured foods and clear drinks. This is called the white diet. During this window your enamel pores are temporarily more open, making your teeth more susceptible to staining. Avoiding dark foods and drinks during this period protects your results and helps them last longer.
Why the white diet matters after teeth whitening
During a professional laser whitening treatment, the whitening gel temporarily opens the microscopic pores in your tooth enamel. This is what allows the whitening agents to reach the deeper layers of the tooth and remove accumulated staining.
After your treatment, those pores take approximately 48 hours to fully close. During this window, anything that contains chromogens — the pigmented compounds found in dark foods and drinks — can penetrate the enamel more easily than normal and leave new staining behind.
In other words, the same process that makes whitening so effective also makes your teeth temporarily more vulnerable. Following the white diet during this 48-hour window is one of the single most effective things you can do to protect your investment.
The 48-hour rule: Your enamel pores are most open immediately after treatment and gradually close over the following two days. The first 24 hours carry the highest staining risk. After 48 hours, your results are stable and you can return to your normal diet.
What to eat after teeth whitening — the white diet
The white diet is exactly what it sounds like: white, pale, or light-coloured foods that contain little or no chromogens. Think of it as the opposite of everything that stains a white tablecloth.
- Chicken & turkey (plain, no sauces)
- White fish (cod, haddock, plaice)
- White rice & plain pasta
- White bread & plain crackers
- Eggs (boiled, scrambled, poached)
- Milk & natural yoghurt
- White cheese (mozzarella, brie)
- Bananas & pears
- Cauliflower & white cabbage
- Potatoes (boiled or mashed, no butter)
- Water, still or sparkling
- Milk & clear herbal teas
- Coconut water
- Coffee & black tea
- Red wine & dark spirits
- Cola & dark fizzy drinks
- Berries (blueberries, blackberries)
- Tomatoes & tomato-based sauces
- Soy sauce & dark marinades
- Balsamic vinegar
- Curries & turmeric
- Dark chocolate
- Beetroot
- Smoking & vaping
- Orange & fruit juices
- Energy drinks
Hour by hour — the first 48 hours
Not all hours are equal. The risk of staining is highest immediately after your treatment and gradually reduces as the enamel pores close. Here is what to expect and do at each stage.
Tricky foods — what about the grey areas?
Some foods are not obviously dark but can still cause issues. Here is a quick reference for common questions we get in the clinic.
| Food or drink | Status | Notes |
|---|---|---|
| White wine | Caution | Less staining than red, but still acidic. Best avoided for 48 hours. |
| Milk coffee (latte/flat white) | Avoid | Milk does not cancel out the chromogens in coffee. Avoid entirely for 48 hours. |
| Green tea | Avoid | Contains tannins and chromogens. Treat it the same as black tea. |
| Orange juice | Avoid | Highly acidic and can cause sensitivity on freshly whitened teeth. |
| Soy milk | OK | Fine as a dairy alternative. Light colour, low staining risk. |
| Coconut milk | OK | Good option — white colour, no chromogens. |
| Butter | Caution | Fine in small amounts. Avoid coloured spreads like pesto or marmite. |
| Alcohol (clear spirits) | Caution | Vodka, gin — less staining risk but alcohol dehydrates enamel. Limit if possible. |
| Mouthwash | Caution | Use a clear/white mouthwash only. Avoid coloured mouthwashes for 48 hours. |
| Lipstick | OK | No effect on teeth — feel free to show off your results! |
What if my teeth feel sensitive after treatment?
Some clients experience mild sensitivity for 24–48 hours after their whitening treatment. This is completely normal and temporary. The whitening process temporarily affects the water content in the enamel, which can cause a brief increase in sensitivity — particularly to hot and cold temperatures.
If you experience sensitivity:
- Avoid very hot drinks and very cold drinks for the first 24 hours
- Stick to lukewarm or room-temperature food and drinks
- Use a sensitive toothpaste (such as Sensodyne) for a few days after treatment
- Avoid acidic foods and drinks (orange juice, vinegar, fizzy drinks) which can aggravate sensitivity
Sensitivity almost always resolves completely within 48 hours. If it persists beyond this, contact your dental professional for advice.
Our gel is peroxide-free — The White House uses a whitening gel that contains no hydrogen peroxide or chlorine dioxide, which significantly reduces the risk of sensitivity compared to many other professional whitening systems. Most clients experience no sensitivity at all.
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Book Your Appointment →How to keep your teeth white long-term
The white diet is just the first step. Once your enamel has fully closed after 48 hours, here is how to keep your results looking their best for as long as possible.
- Use a home maintenance kit every 3–4 weeks. Our professional take-home kit takes just 30 minutes and prevents staining from building up between treatments. It is the single most effective way to extend your results towards the two-year mark.
- Use a straw for cold staining drinks. Using a straw for iced coffee, cold brew, or dark soft drinks reduces direct contact between the liquid and your front teeth.
- Rinse with water after staining foods. A quick rinse after coffee, tea, or red wine washes away chromogens before they have time to settle into the enamel.
- Brush twice daily with a whitening toothpaste. A good whitening toothpaste removes surface stains before they have time to penetrate the enamel.
- Book a professional top-up before you notice fading. Our 20-minute top-up from €85 restores your results quickly. Most clients return every 12–18 months.
Frequently asked questions
No — avoid coffee for at least 48 hours after your treatment. Coffee is one of the most common causes of teeth staining, and your enamel pores are temporarily more open after whitening, making them more susceptible to re-staining. Even adding milk does not cancel out the chromogens in coffee. After 48 hours you can return to your normal coffee routine, though using a straw and rinsing with water afterwards will help your results last longer.
For the first 48 hours after treatment, you should follow the white diet — sticking to white or light-coloured foods and avoiding anything that could stain a white shirt. After 48 hours, your enamel has rehydrated and you can return to your normal diet. The white diet is temporary and designed to protect your results during the most vulnerable window after treatment.
Red wine should be avoided completely for 48 hours — it is one of the most potent staining drinks. Dark spirits and mixers should also be avoided. Clear spirits such as vodka or gin carry less staining risk but alcohol generally dehydrates tooth enamel, which can increase sensitivity. If you do drink alcohol within the 48-hour window, stick to clear options and drink plenty of water alongside.
The white diet should be followed strictly for 48 hours after your treatment. The first 24 hours carry the highest staining risk, but we recommend continuing for the full 48 hours to ensure your enamel has fully closed before reintroducing staining foods and drinks. After 48 hours you can return to your normal diet.
You should not smoke or vape for at least 24 hours after teeth whitening — ideally 48 hours. Nicotine and tar are among the most potent causes of tooth staining, and with your enamel pores temporarily open after treatment, the risk of rapid re-staining is significantly higher than normal. If you smoke regularly, we recommend a top-up every 6–12 months rather than the standard 12–18 months.
In the first 2 hours after treatment, stick to water if possible, or very plain white foods such as plain rice, white bread, or a banana. The first 2 hours are the highest-risk window for staining, so the less you consume during this period the better. After the first 2 hours, you can eat any of the white diet foods: chicken, fish, eggs, white rice, pasta, yoghurt, and milk.
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