Hi everyone, I've been a type 1 diabetic for 23 years. During this time I have been using artificially human simulated insulins. From my very first few weeks of using insulin, I noticed a a very unusual change in my normal sparkly self. I had lost it, this has been the same for many years and each time I'd ask my doctor / consultant the reason for this, I didn't get an answer. Finally after many years the obvious was stated by a non diabetic who has a valid interest in diabetes, insulin is a hormone.When you are injecting a hormone into yourself a few times a day, there's got to be an imbalance of some sort. I have monitored my mood swings and they are more apparent than ever.I'm acting like someone who is suffering from extreme permanent P.M.T. This is not good, and it is getting me down. I am 47 years of age and I am very healthy and work out for a solid hour and a half every other day at the gym. My HBA 1 C's have been great up to recently, but this might be due to having a faulty pen for a little while (i.e. 3 months). I'll know when I get it checked again soon.If any person out there is having similar symptoms or knows what's going on, please get in contact with me because my life is being seriously effected.