brain damage from lows

Technically, that is true, that lows can cause brain damage. But you're talking about devastating lows, the kind of lows that render a person unconscious, with ambulance trips to the hospital and lifesaving measures, not what I call "routine" lows.

So technically, yes, it IS possible to get brain damage from repeatedly going into insulin shock-- every time a person has a near-death experience from insulin, it's very possible for brain tissue to die. I think this is rather unusual, though, because most people, once they've gotten a load of what a real low feels like, avoid them like the plague.

My son had a friend in HS who was a type 1 diabetic and very careless about eating. He took his insulin injections just fine, but always forgot to eat. The 3rd time he was brought back from the brink of death in the ER, the docs told his parents that if he didn't quit it, they couldn't guarantee he wouldn't emerge from the next incident (if he lived through it) without brain damage. That was over 15 years ago; I still wonder about whether or not he's even alive anymore.