Not the OP but since they said the disease might have been caused by refined carbs, the most likely candidate is diabetes. There is strong evidence that a keto

Not the OP but since they said the disease might have been caused by refined carbs, the most likely candidate is diabetes. There is strong evidence that a ketogenic diet helps prevent/diminish seizures in epileptic patients. And there's some initial but promising research it can help reduce symptoms of Alzheimer's disease – and possibly Parkinson's and ALS. There's also some very early research that a ketogenic diet might slow the growth of certain cancerous tumors. But specifically for cancer, there's also evidence that a ketogenic diet has no long-term improvement of survivorship – though might have short-term improvement. My conclusion is that the science is still very much out, and it's way too early, from my layman's reading, to make any claim about those diseases being caused by refined carbs.