It is best to use natural toothpastes. Make sure your toothpaste is free from salicylates, fluoride, artificial sweeteners for example saccharin, and sodium lauryl sulphate. Try to avoid anything with the words glycol, propylene, polyol. Chemicals to avoid in toothpaste are Saccharin – an artificial sweetener Antimicrobials – alcohol or triclosan. These can result in antibiotic resistant bacteria Chlorine dioxide – an industrial bleach Sodium lauryl sulphate (SLS) which is an industrial detergent and may cause allergies Sodium lauryl sarcosinate is used as a foaming and cleansing agent. Sodium hydroxide (NaOH) which is caustic soda. It is also an industrial detergent and drain cleaner Salicylates which cause allergies. Aspirin is salicylic acid PEG/PPG is polypropylene glycol which acts as a wetting agent. It is also in the substance used as a gel when having an ultrasound and is found in baby wipes etc. For more information about natural toothpastes aheck out http://www.allergiesandcfs.com/1/post/2012/06/natural-toothpaste-is-best-for-you.html