By Caroline Jacobson

For many people, perfect white teeth are the key to land their dream job, have success in romance and have higher salaries, according to a 2007 study. No wonder teeth whitening is a multi­billion-dollar business!

Whitening agents are effective and safe in moderation, but they’re not for everyone. Many individuals with sensitive teeth or previous restorations are forced to forego bleaching.

If bleaching isn’t for you, whiten and brighten with something you already do—eating. What you eat can help (or hurt) your teeth. These foods can complement an already top-notch teeth care routine.

• Make strawberries your jam.

This fire-engine fruit doesn’t exactly set off the “white” siren. Don’t let its cardinal color confuse you—strawberries contain malic acid, an astringent that removes tooth discoloration on the surface.

• Celery-brate good times.

Crunchy veggies like celery do wonders for your waistline and your gum line. These fiber-rich foods stimulate saliva, which helps wash away food debris. Try switching up celery with broccoli, carrots or cauliflower—these vegetables deliver the same benefits.

• Keep calm and dairy on.

Low-fat milk, yogurts and cheeses are all white smile superstars. In addition to tooth-strengthening calcium, dairy contains lactic acid. This acid fights decay and acts as a shield to harmful bacteria.

• Face the flax.

Flaxseed is rich in Omega-3 fatty acid, the most potent anti-inflammatory nutrient. And foods that reduce inflammation may protect against gum disease. Mix flax into muffins or your morning smoothie.

• Stick to your gum(s).

Sugarless gum can work wonders for your white smile. Gum promotes saliva production, which rinses your mouth while freshening your breath. Look for gum with xylitol, a natural sweetener that prevents decay-forming bacteria from doing damage.

Get snackin’ on your smile! You are what you eat—and so are your teeth.