We're told fatigue is 'just stress, sleep more'. The truth is richer: cellular energy, the stress axis, thyroid, sleep architecture, silent inflammation. Five threads, and plenty of false fixes sold along the way. Three levels of traps: common myths, orders of magnitude that mislead intuition, and the nuances weekend wellness gurus tend to miss. Sources: WHO, NIH ODS, Cochrane. See our terms and conditions. The information shared here does not replace advice from a qualified health professional.