Four years ago I first posted here, when I was helping out a friend who had recently been diagnosed. She'd had problems for a long time before that, with loss of smell at least 8 years ago.
In the past four years, with HDT, she has improved, and the Parkinson's has never progressed. Some people don't believe she ever had Parkinson's. She does, and still takes levodopa/carbodopa. Her psychiatrist, who is also a neurologist, doesn't believe she has it. She continues to have a small tremor and some balance problems but just the fact that she's never gotten worse is a confirmation that Dr. Costantini was correct.
Maybe this testimony will help others decide to try it.