preface Milk is good for each; Every once in a day; Bread, there's something in there; Chicken, the tastiest piece of meat; Peanut butter, who has not grown big; Exercise is healthy ... Who has become "not big" with the above slogans? In the meantime it is clear that many people walk around with intolerances and / or allergies against "everyday" products such as milk, egg, gluten, nuts etc. etc. Until recently this was not believed. Can 'intolerance' exist against 'everyday' movement (effort?). Can this even be harmful? And for whom? How can this be investigated and diagnosed? Is there an optimum (no minimum) for different patients with a chronic disease? And for ME / CFS patients? The international literature usually refers to CFS (chronic fatigue syndrome) and sometimes to ME / CFS (ME / CFS). However, due to the distinction between ME and CFS on the basis of the new international consensus document, we argue for the name ME (see also our previous article: http://www.psychfysio.nl/Nieuws/6_01_1.html). Myalgic encephalomyelitis ME, which is also referred to in the literature as chronic fatigue syndrome (CFS), is a serious, complex disease in which a fundamental disruption of the central nervous system, immune and endocrine system occurs. In addition, there are often gastrointestinal problems and always disorders in the energy supply (often also cardiovascular). Chronic fatigue is no longer seen as a head complaint. *Edited in accordance with forumrules* https://www.psychfysio.nl/6_05_2/ Entire article in the link above, google translate is your friend.