I’m talking about prescribed vials which are meant to only be used for a month and not the diy vials which have enough for a whole year. I know that the preservative they use can’t really go beyond a month. And that if the preservative fails you might be injecting a pathogen directly into your body which is not optimal.
tbh injecting more frequently also avoids / reduces mood swings and other symptoms from too much and too little E - great idea all around, pre-op I injected EV every 3.5 days (twice a week).