Usually  medicine that actually works has some negative side effects.<p>Commercialization of mindfulness business seems to cause all kinds of bullshit quackery as a side effect. There are plenty of minfulness instructors who don&#x27;t have sufficient experience and understanding. They just drink the Cool-Aid and brush aside things that don&#x27;t sell.<p>I have been training zen meditation for 15 years and  many of my friends are long time Vipassana meditators.  All experienced meditation&#x2F;mindfullness teachers know that there can be negative side effects and everyone can&#x27;t use the same method as everyone else.  Meditation can sometimes trigger mental illness or trauma. For many people it&#x27;s good idea to start going into therapy after they start meditation practice. Unfortunately sometimes people want to use mindfullness as replacement for medical treatment and&#x2F;or therapy (Mindfulness-based cognitive therapy (MBCT) is just fine. It&#x27;s actual therapy done under supervision of a therapist)