Would you use old toothpaste? I was alarmed to discover that a friend of mine is using Oral B toothpaste that expired in 2013. According to Colgate, its toothpaste is good for 12 to 18 months past the expiration date (which is two years after manufacture), beyond which there may be some loss in fluoride stability, ingredients may separate out or crystallize, and flavours may diminish. mint green colored items to wear for formal occasion usage