You are misinformed. The tools for measuring brain changes are getting better and more precise. We now have tools to measure brain activity, gray matter thickness, stress levels, and these reports are as good as measuring NO2 from engine exhaust. There's so much literature around this, it just knocks your karma if you spout ignorance just because you choose not to look.
”There is a common misperception in public and government domains that compelling clinical evidence exists for the broad and strong efficacy of mindfulness as a therapeutic intervention,” a group of 15 scholars wrote in a recent article entitled Mind the Hype. The reality is that mindfulness-based therapies have shown “a mixture of only moderate, low or no efficacy, depending on the disorder being treated,” the scholars wrote, citing a 2014 meta-analysis commissioned by the US Agency for Healthcare Research and Quality.
Source:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5758421/#!po=0....
