Professional teeth whitening can brighten your smile dramatically, but the days immediately following your treatment are crucial. During this time, your enamel is slightly more porous and vulnerable to staining, which means certain foods and drinks can quickly dull your results. Avoiding these culprits for at least 48 hours, and ideally up to a week, helps you maintain that fresh, bright finish. Here are 4 foods you should steer clear of after teeth whitening.