Why Expired Whitening Strips Might Be in Your Bathroom
Found an old box of whitening strips in the back of your drawer?
Just like any dental product, whitening strips lose potency over time. That means less whitening power and potentially more risk of irritation. If you want real results without the guesswork, it’s worth checking the expiration date before using them.
What Happens If You Use Expired Whitening Strips
Using expired whitening strips isn’t usually dangerous, but it’s not ideal either.
The active ingredients, like hydrogen peroxide, break down over time. That means the strips may not whiten your teeth as effectively or at all. You could end up with uneven results or no noticeable change.
In some cases, the strips might feel different, too. They can dry out, peel oddly, or not stick well to your teeth. And while rare, using an expired product could increase tooth sensitivity or cause slight gum irritation.
If the strips look off or don’t feel right, it’s best to play it safe and toss them.
How Long Do Whitening Strips Last Before They Expire
Most whitening strips have a shelf life of about 12 to 24 months from the manufacturing date. That gives you plenty of time to use them, but storage matters.
If they’ve been sitting in a hot or humid bathroom, they may lose effectiveness faster. Storing them in a cool, dry place helps preserve the active ingredients for longer-lasting results.
For more details, check out our guide on the duration and effectiveness of whitening strips.
How to Find the Expiration Date on Crest White Strips
Wondering if your strips are still good? Start by checking the packaging.
The expiration date is typically printed on the bottom of the box or on the back of each individual foil pouch. It might be labeled as “EXP” followed by the month and year.
If you’ve already tossed the outer box, check the foil wrapper. No date there either? Look for signs like the strips feeling dry, brittle, or discolored. If they don’t stick well or look yellowed, it’s probably time to replace them.
When in doubt, fresher is better, especially when it comes to results and comfort.
What About Expired Toothpaste or Mouthwash?
Whitening strips aren’t the only oral care products with a shelf life. Toothpaste and mouthwash can expire, too.
Over time, the fluoride in toothpaste loses its cavity-fighting strength, and mouthwash may become less effective at killing bacteria.
In some cases, ingredients separate, the texture changes, or the product develops an odd smell or taste.
Just like whitening strips, it’s best to replace any product that’s expired, especially when your oral health depends on it.
Should You Brush Your Teeth After Using Whitening Strips?
A lot of people wonder whether to brush before or after using whitening strips. And it’s a fair question.
The general advice is to wait at least 30 minutes after using the strips before brushing your teeth. Whitening agents can temporarily soften enamel, and brushing too soon can cause sensitivity or irritation.
Natural Alternatives If Your Whitening Strips Are Expired
If your whitening strips are expired or just not working for you, there are still safe ways to brighten your smile.
Baking soda is a gentle, natural abrasive that can help remove surface stains when used properly. Whitening toothpaste is another easy daily option, especially those formulated with low-abrasion ingredients.
And of course, nothing beats a professional cleaning for removing buildup and lifting stains you can’t tackle at home.
FAQs
What does an expired whitening strip look like?
Expired strips may appear dry, brittle, or slightly yellowed. If they don’t feel sticky or won’t stay in place, they’re likely no longer effective.
Can you store whitening strips in the fridge?
Yes, storing strips in the fridge can help extend their shelf life. Just make sure they’re sealed and protected from moisture.
Will expired whitening strips damage my enamel?
Probably not, but they may cause gum irritation or increased sensitivity due to chemical breakdown. If they feel off, skip them.
Are unopened whitening strips still good after two years?
They might be, especially if stored properly. But even unopened, the whitening power fades with time, so results may be less noticeable.
What should I do with expired whitening strips?
If they’re past their prime, it’s best to toss them and use a fresh box. It’s the safest way to protect your teeth and get the results you want.
Key Takeaways
- Whitening strips do expire and lose their whitening power over time
- Always check the expiration date or look for signs like dryness or discoloration
- If you’re unsure, go with fresh strips or explore safe natural alternatives
- Good storage and brushing habits help you get the most out of your whitening routine
Want more smile-saving tips? Follow @joycethedentist for expert advice that keeps your teeth glowing.
