If you're looking for a white-toothed smile, look to America. Dr Richard Marques – AKA the King of Smiles – has a new USA-made mouthwash developed to whiten teeth while it freshens breath.
Super Strong 100% Natural Tooth Whitening & Breath Freshening Mouthwash (£20) contains aloe vera and fennel seed oil to whiten teeth and peppermint oil for odour removal. It's labelled as containing only natural ingredients.
Based in Marylebone, London, Dr Richard Marques also has a range of toothpastes.