I’m not one to worry about expiration dates too much but, I have quite a few blue hearts that expired in February of 2018. They have been stored in their bottle with a desiccant bag, at room temp. The pills aren’t crumbling or anything like that. I wouldn’t think twice if it had only been a year or two but we’re going on 7 years now. I’m not worried so much about them being safe but is the potency all but gone by now?