1) During and two weeks after whitening, a diet consisting of non-staining food ingredients should be followed, and in particular the consumption of coffee, tea, red wine, borscht, soy sauce, juices and dark-coloured drinks should be avoided, 

2) It is imperative to give up smoking, 

3) Use the hygiene treatments and preparations prescribed by the doctor, 

4) In order to maintain the whitening effect for as long as possible, a dental check-up should be performed no later than every 6 months, dental deposits should be removed regularly, oral hygiene should be maintained according to the doctor's recommendations, and the intake of liquids and foods containing dyes should be minimised. The maintenance of the whitening effect depends on the patient's diet and habits.