Persistent fatigue that does not improve with rest is one of the most common complaints among women, and one of the most misunderstood. Iron deficiency can cause exhaustion, brain fog, and mood changes long before anemia appears on a standard blood test. If you have been told your labs look normal but still feel drained, this article is for you.

Feeling mentally foggy? Brain fog is common during perimenopause, menopause, and long COVID. This evidence-based guide explains the causes, what helps, and when to see a clinician.