Consuming hard cheese or dairy products after the ingestion of an acidic beverage has also been suggested to be beneficial in promoting the re-hardening of enamel. Chewing gum containing carbamide can provide a rapid rise in salivary pH, which may assist in reducing the effect of the erosive agent. Sugar-free chewing gum and fluoride containing or carbamide containing chewing gums, may also help to stimulate salivary flow. The latter play an important role in protecting vulnerable tooth surfaces from the effects of erosive agents. TridentWhite from Cadbury (UK) is a chewing gum containing recaldent (as described above) which may also prove beneficial for the preventative care of tooth wear cases.