[wahern]

Unfortunately, it can also change your brain, or hasten changes to which you're predisposed, in a way that can make you anxious, depressed, or suicidal:

  https://www.theatlantic.com/health/archive/2014/06/the-dark-knight-of-the-souls/372766/

It's worth mentioning this because while meditation could help more people than it could hurt, the magnitude of the hurt can be much greater than the magnitude of the benefit. Meditation might make 20 people moderately more happy, but it could bring 1 person to depression and a premature death.