Smirk Powder is a mild abrasive, it is perfectly safe for use 2 times a week before brushing with your usual toothpaste.  We advise a maximum of two applications per week.
In the first week, you can use it once per day. Brush for 3 to 4 mins per-use, then rinse well and use your regular toothpaste. Week 2 onwards, revert to the normal regular use, once or twice a week. This will ensure your enamel is protected, whilst getting smirk-worthy whitening results.
Smirk Strips and Smirk Box can be used daily.