Please Help

A few years ago, a close friend of mine (45), went into a severe depressive state due to extreme stress from work. She had to take a 3 month leave and she didn’t recover from this for several months after that.

The thing is, she never fully recovered. Her personality has been different since this mental health crisis. She became very carefree and forgetful. It almost seems like early onset dementia. Her memory has been greatly impaired since this incident.

But the change in her personality is not the issue. The issue is that ever since this incident, eating sugar or carbs made her feel awful. To explain the extent of this, if she eats just one piece of bread, a few hours later, she will get severe migraines and tiredness that can last for several days.

Since she cannot eat sugar or carbs, she can barely eat anything. She’s on a keto diet to prevent the migraines and negative effects associated with consumption of sugar and carbs.

She’s been to a neurologist and several doctors, but none of them know the cause of this. They just say “Well it looks like you found a way to treat this yourself, so there’s really nothing more we can do.”

YEAH EXCEPT SHE CANT EVEN EAT MASHED POTATOES?? THAT’S KIND OF A PROBLEM-

If anybody has any idea the reason for this, please let me know. We’ve been trying to find answers for 4 years now, and to no avail. 😔