Saw results the first time i used the powder.
Lower teeth yellowish from maturity and coffee. Use it every night.

Teeth whitening powder works well and has not affected mu sensitive teeth at all!

Gentle foaming and I think it is working a bit

Notice a difference right from the start!

The main benefit for me was that the powder does seem to be helping to strengthen and rebuild the tooth enamel, which was quite degraded after many years of too-firm brushing. Some whitening effect, though not quite like the promos.