Avoid staining foods 

Certain foods and drinks are known enemies of tooth whitening for their potent staining powers. Some of the most common offenders include:

• Coffee
• Tea
• Berries
• Red and white wine
• Tomato sauce
• Sugary foods and drinks

These foods and drinks are known for containing certain properties that break down tooth enamel and leave stains — the last thing you want after spending time and money on a professional whitening.

Eat foods that protect your teeth

There are some foods that are good for your oral health that can help you keep your teeth healthy and dazzling.

Crunchy fruits and vegetables that are packed with water, like celery and apples, help produce saliva when you chew them. Saliva helps neutralize acids that break down tooth enamel and leave your teeth more susceptible to stains.

Cheese is another great food for your teeth for similar reasons — chewing cheese helps increase saliva production, and cheese has calcium and phosphorus which helps keep your tooth enamel strong and resilient to decay and stains.

Brush after every meal

Although some foods and drinks can stain your teeth more intensely than others, most foods and drinks can undo the effects of your teeth whitening over time.

Brushing your teeth after every meal will help extend the life of your professional whitening. By brushing away food particles and bacteria, you’ll help keep your teeth healthy and strong, so they can fight off stains and decay.

Keep a toothbrush at work so you can brush after lunch or coffee. When you’re on the go and can’t brush after a meal or snack, swishing your mouth thoroughly with mouthwash can help wash away stain-causing bacteria.

Use a straw

Although you may not typically think to drink coffee, tea, or wine through a straw, it can help you enjoy some of your favorite drinks while avoiding stains.

Drinking through a straw can keep beverages from touching the outside of your teeth. You can use a straw to drink sodas and sports drinks too, which often have artificial coloring (and lots of sugar) — both of which can break down tooth enamel and stain your teeth.

For the best results, put the straw’s end at least halfway into your mouth to keep your drink from hitting the outside of your teeth.

Don’t smoke

In many cases, it only takes a few months of smoking for the nicotine and tar in cigarettes to stain your teeth yellow, with or without investing in a professional whitening.

After several years of heavy smoking, your teeth can even turn from yellow to brown.

Smoking poses more serious concerns than just stained teeth — smoking increases your risk of gum infections, gum disease, plaque, and even oral cancer.

So, if you want pearly whites and healthy teeth and gums, snub the cigarette.

Visit your dentist regularly

To maintain good oral health, you should visit your dentist for a cleaning and checkup at least once a year. 

But if you’ve recently gotten your teeth professionally whitened, your dentist may recommend quarterly visits. More frequent visits give your dentist a chance to give you whitening touch-ups that will keep your teeth looking their best as time goes on.