Some update on my experience with HBOT:
I bought a 1.5 ATA unit from Macypan a little more than 1 year ago. Since then, I have done about 180 1-hour sessions on the unit. Due to life circumstances, I usually have to take breaks several weeks long from HBOT, but when I can do it, I do it every day, usually in the evening.
I was basically healthy before starting with HBOT and had been keeping up to date with the health research on this forum. So I didn't find much changes from the HBOT experience except for one aspect, which I will give more detail below.
About 3-4 years ago, I discovered that I had been suffering from very mild symptoms of Parkinson's disease, which explained the mental and emotional issues I got all my life. I learned to control it with daily NeurOptimal sessions and L-Tyrosine supplement, which already improved my quality of life significantly.
Fast forward to the present, the HBOT sessions have made it possible for me to stop NeurOptimal and reduce the L-Tyrosine intake by a huge amount. If I had to take 1/4 teespoon (about 1 gram) every day before, I only need to take a tiny amount (20 - 30 mg) twice a week now. I've achieved much success in both my career and intimate relationship as a result, which I could only dream of in the past.
I have no doubt that HBOT has made it all possible by healing my brain. So I will continue with HBOT for as long as I can. Who knows what else it can bring?
Before ending, I highly recommend the book The Oxygen Revolution, where the authors talked about the myriad ways that brain injury can happen for most people, and how HBOT can heal it. I can add my personal testimony to the case studies there.