In other words, someone has had personal experience with something and they are then saying that everyone can have that same experience. This is the least reliable or valid of any information you will read. What is true for one person may not be true for you or another. Some information is based on generally accepted practice guidelines. For example, yoga and meditation are generally accepted as effective forms of relaxation.
Some information is based on research findings.
If this is the case, the research source should be explicitly cited or some attempt should be made to cite the source of the data. The information contained on a web-site should never be used to diagnose. Health professionals use sophisticated diagnostic tools and a wealth of professional and personal experience to draw conclusions about your problems and their treatment. The internet should only be used as an adjunct to professional advice. Once you know what you are facing, THEN look for information.