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Whitening strip expiration dates

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#1 2009-01-07 14:22:56

donnadee
New member
Registered: 2009-01-07
Posts: 2

Whitening strip expiration dates

Hi, I have several boxes of Crest whitening strips that have old expiration dates.  One box exp in 2002 and another in 2007. Are these still effective, dangerous?  i'd hate to throw them out as they are sealed and unused from a family member who didn't use them.
Thanks

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#2 2009-01-24 11:58:22

donnadee
New member
Registered: 2009-01-07
Posts: 2

Re: Whitening strip expiration dates

It's been over 2 weeks now that I've posted and 120 read it.  Doesn't anyone have any help for me?  Administrator?  Anyone?

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#3 2009-01-25 07:14:20

James
Administrator
Registered: 2006-09-05
Posts: 101

Re: Whitening strip expiration dates

Hi Donna,

It is not dangerous to use them - they just won't be as effective. Over time, hydrogen peroxide will break down and eventually not work at all. You willl have luck with the 2007 strips, but probably not with the 2002 strips. Let us know how it goes.

cheers.

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