After teeth whitening, it's best to avoid dark-coloured beverages like coffee, tea and red wine for at least 24 to 48 hours. During this time, your teeth are more susceptible to staining. After the initial period, it is good to continue to be mindful of what staining food and drink you consume. Bolognese and curries can also stain teeth, even after the initial 48-hour period. Maintaining good oral hygiene and moderation with staining foods can help preserve your whitening results. Quitting smoking is also strongly recommended.