Colgate whitening system - quick question

[PorridgeIsYummy]

Hi, I'm using this whitening system with my tooth trays and I'm running out of gel. I've had a look online and you can't buy replacement get syringes in many places at all. The price also seems quite extortionate! I've seen there are other tooth whitening gels around, such as Phillips and other branded ones. Can I buy those instead?

Thanks.

Yes, you should be able to use a different type of whitening in your trays, just check what the active ingredient % is in the Colgate one and then look for one that's the same. Did you get it from the dentist in the first place or somewhere else?