Do Whitening Strips Expire? – Here’s What We Found

You bought that package of whitening strips to help brighten your teeth before a job interview that ever happened. Disappointed, you kept them in your house and today you’ve decided to use them. Unfortunately, you find out that they’ve reached their expiry date.

It leaves you wondering if you should continue using them after they’ve expired or you should just toss them into the garbage bin and get a new package.

Have the teeth whitening strips expired? Do all the whitening strips expire?

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In this post, we’re going to explain to you what it’s like for whitening strips to hit an expiry date.

Do Teeth Whitening Strips Really Expire?

Yes, they do. And this is the reason why you’ll find the manufacturer printing the expiry date on the strips package to inform you about it. The tale behind the expiry of these whitening products is based on their whitening/bleaching agents. The agents are usually unstable, which means that they’ve got a definite shelf life. The moment the active ingredient (hydrogen peroxide) degrades completely, the strip expires.

The typical shelf life for all whitening strips is one year. However, the professionals argue that you extend its lifetime by another one year by storing them in a refrigerator. But freezing them isn’t advisable. If your refrigerator is too cold such that it freezes the strips, you should allow them to cool down to the room temperatures before applying them on your teeth.

Is it Wise to Use Whitening Strips After Reaching their Expiry Date?

Is it wise to use expired whitening strips?

If you decide to use a package of expired whitening strips to whiten your teeth, you might be wasting your time.

It is based on the fact that the active ingredients in the whitening strips have degraded and thus become less effective at whitening your teeth. If the strips expiration date was not reached long ago, they might still whiten your teeth (but poorly). But if they expired a long time ago, the whitening effectiveness might have been eliminated, and there’s no need to waste your time on them.

NOTE: contrary to what your friends might have told you, using expired teeth whitening strips will not hurt your teeth or overall body health.

If you’re using professional grade whitening strips, this is your part. Such whitening strips contain water. Like any other beauty product that contains water, the strips might act as a good breeding ground for the bacteria. This, in turn, causes untold consequences to your oral health.


Teeth whitening strips do expire. And once they do, their whitening effectiveness is significantly reduced or even completely wiped out depending on the length of expiry period. But unlike what most people believe, an expired whitening strip cannot harm your teeth.

Expiry of your whitening strips does not signal the end of teeth whitening from the comfort of your home. These products are readily available at your local pharmacy and are very cheap. Just throw your expired strips away, get a new box and start whitening your teeth.

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