The simple answer is no. You can’t prevent BPPV. I’ve had it a number of times over the past 6 years all seemingly random
Twice I had it within a few weeks of each other while other times it was years between occurrences.
I don’t drink booze (stopped 6 years ago), never smoke, no drugs, my only vices are peppermint tea and sparkling water.
I’m currently reading this book - https://www.amazon.com/dp/1989603858/ref=cm_sw_r_cp_awdb_imm_t1_fM2cGbZVH8YPM and think a lot of people on here would benefit from it.
No response from people after the study is almost 100% a positive thing. It's well known that people are far less likely to provide feedback on positive experiences, and way more likely on negative experiences. The fact we have barely heard of any negative experiences can only be a good sign.
The science behind NORT is also already well established and proven to work for other vision deficiencies caused by e.g. concussions, strokes and other issues. My opthalmologist had me doing visual therapy before NORT was known about (and it helped me), can't be a coincidence that they are the same thing with NORT specifically targeting VSS.
Personally, I am waiting for the program to be released so that I can do it with my opthalmologist as she is excellent. The key to vision therapy is being dedicated and repeating the exercises as instructed. Even beyond the 20 weeks it is worth continuing to do them as you can keep proving (just to a lesser degree).
One last thing, a lot of this is also based on the idea of neuroplasticity (the ability for the brain to reconfigure itself). VSS creates a feedback loop where the more you think about it the more you notice it, which creates anxiety, which has been proven to cause issues with vision, which can make VSS even worse. By literally not thinking about it as a bad thing and trying to ignore it you will have improvements (obviously easier said than done). NORT helps with this by improving VSS and breaking that feedback loop so your brain also adapts and once again begins to filter out the noise. If you're interested in neuroplasticity check out this book 👍