UK's National Health Service http://www.nhs.uk/Conditions/Bad-breath/Pages/Causes.aspx http://www.nhs.uk/Conditions/Bad-breath/Pages/Causes.aspx http://www.nhs.uk/Conditions/Bad-breath/Pages/Causes.aspx http://www.nhs.uk/Conditions/Bad-breath/Pages/Causes.aspx http://www.nhs.uk/Conditions/Bad-breath/Pages/Causes.aspx UK's National Health Service UK's National Health Service NHS: Bad breath (halitosis) – Causes