Teeth Whitening Aftercare: How to Keep Your Smile White for Longer

Oct 7, 2026

By David Hall

After each whitening treatment, wait 1 hour before eating or drinking anything except water. You do not need a strict "white diet": research on dental bleaching shows that coffee, tea and red wine do not reduce whitening results. To keep your smile brighter for longer, rinse with water after dark drinks and keep up your 10-minute top-ups every 2 weeks.

You have just finished your SmilePro whitening session and your teeth are looking their brightest. This guide covers everything you need to know about aftercare: when to eat and drink, the habits that help your result last, what to do if your teeth feel sensitive, and how to maintain your results week after week.

How long should you wait to eat or drink after teeth whitening?

Wait 1 hour after each treatment before eating or drinking anything except water. This is the same rule for every SmilePro product: the Advanced Kit, refill pens and whitening strips. After that hour, enjoy your usual coffee or tea, and rinse with water afterwards to help your results last.

Do you need a white diet after teeth whitening?

No. Two 2024 reviews of clinical studies on dental bleaching found that a restricted white diet does not change whitening results, and that drinking coffee, tea or red wine during treatment did not significantly reduce how well bleaching worked. You can keep eating normally once the first hour has passed.

Dark drinks still add staining back over time, which is why simple habits and regular top-ups matter more than cutting foods out.

Love your coffee? Read our guide: Teeth whitening for coffee lovers →

Habits that help your results last

A few long-term habits will help your results last longer between sessions:

Rinse with water after coffee, tea, red wine and other dark foods or drinks.
Drink staining drinks through a straw when it suits you; it helps reduce contact with your teeth.
Brush with SmilePro Whitening Toothpaste as part of your daily routine; it helps lift everyday surface stains.
Avoid smoking or tobacco products, which cause deep and difficult staining.
Brush twice a day for two minutes, and keep up your dental check-ups.

How to look after your teeth if they feel sensitive

Some people notice temporary sensitivity to cold straight after whitening, and the Oral Health Foundation says it is usually short-term. If it bothers you or does not settle, talk to a dentist. SmilePro's gel is formulated to help prevent sensitivity in healthy teeth, with potassium nitrate in the formula. If you do notice some tenderness:

Use a toothpaste for sensitive teeth for the first few days if needed.
Avoid very hot or cold drinks while sensitivity is present.
Wait at least 30 minutes before brushing after a session.
Use the red LED setting on your SmilePro light, which is designed for a more comfortable treatment.

If you feel discomfort during a treatment, stop, rinse and pause your course. If it does not settle, speak to a dentist. If your teeth were already sensitive, or your gums are unhealthy, see a dentist before you whiten.

How often should you top up?

SmilePro recommends a 10-minute top-up every 2 weeks, or once a week if you drink a lot of coffee, tea or red wine, to stop new stains building up and keep your results looking their best. Your lifestyle decides how consistently you need to top up.

The most practical approach is to keep refill pens on hand, so you can do a quick top-up without needing to think about reordering. The Whitening Pen Pack has 3 pens with 30 treatments, which last over a year at one top-up every 2 weeks. The gel is always used with your SmilePro LED light.

Keep your results going. Shop the SmilePro Continual Care Set, whitening pens plus toothpaste for lasting maintenance →

Building a simple long-term smile routine

You do not need an elaborate routine to maintain your results. Here is a simple framework that fits into any lifestyle.

Morning

Brush with SmilePro Whitening Toothpaste for two minutes.
Rinse with a fluoride mouthwash.
If you are having coffee, rinse with water afterwards.

Evening

Brush and floss thoroughly.
Do a 10-minute SmilePro top-up every 2 weeks, or once a week if you drink a lot of coffee, tea or red wine. An evening top-up works well: after it, wait 1 hour before eating or drinking anything except water.

Quick aftercare checklist

Save this for after your next session:

Wait 1 hour before eating or drinking anything except water.
After that, eat and drink as normal: no white diet needed.
Rinse with water after coffee, tea and red wine.
Use the red LED setting for a more comfortable treatment.
Brush gently with a soft-bristled brush.
Keep your SmilePro refill pens stocked for top-ups every 2 weeks.

Keep your results with the SmilePro Continual Care Set

The easiest way to stay on top of your routine is the SmilePro Continual Care Set. It includes 3 whitening pens with 30 top-ups, about a year at one every 2 weeks, and SmilePro Whitening Toothpaste, which lasts about 2 months. The pens work with the SmilePro LED light included in the Advanced Kit.

SmilePro whitening products are not suitable for anyone under 18, or anyone pregnant or breastfeeding. If you have sensitive teeth or unhealthy gums, see a dentist first.

Shop the SmilePro Continual Care Set and keep your smile bright between sessions →

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