Persistent tiredness that sleep doesn’t fix is one of the most common health complaints, and there are several well-documented causes: iron deficiency or anaemia, underactive thyroid, high chronic stress (which keeps cortisol elevated and disrupts deep sleep cycles), blood sugar instability, and dehydration are among the most frequent. Before turning to supplements or herbal support, it’s worth ruling these out with a basic blood panel. That said, for people whose fatigue is linked to prolonged stress or a demanding schedule rather than a medical cause, adaptogenic herbs — including ashwagandha, rhodiola, and cordyceps — have supporting evidence for improving fatigue resistance and energy regulation over time.
