This is legitimately life-changing. An A1C of 5.4 isn't just "controlled diabetes" — that's a completely normal, non-diabetic value. Your pancreatic beta cells clearly still had reserve capacity, and removing the glucotoxicity let them recover.
The fasting glucose trend is almost as impressive. 198 to 91 is textbook metabolic restoration.
A few questions if you don't mind:
- Did you make significant dietary changes beyond what the appetite suppression naturally caused?
- Any hypoglycemic episodes during the transition off glipizide?
- What's your CGM data look like now? Time in range?