From: Billionaire Teeth Whitening
Re: Is It Okay To Use Expired Teeth Bleach
Is It Okay To Use Expired Teeth Bleach?
The teeth whitening gel in your kit can expire and should not be used for more than 2 years after it has been purchased. This is because after 24 months, the active ingredients will not be as effective and the results will not be prominent.
If the gel appears to have a foggy appearance, this usually means it has oxidised and thus expired. At this point in time you should dispose these and purchase new whitening gels if you wish to continue whitening.
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