If you have dull skin, dark circles under your eyes or brittle nails, social media algorithms may be quick to diagnose you with “ferritin face”. Though not a formal medical diagnosis, the buzzy term has emerged as the latest viral beauty-and-wellness trend describing traits supposedly caused by low ferritin – the cellular protein that stores iron in the body. While iron deficiency anaemia frequently shows up with these visible symptoms, Western medical doctors caution that a complex metabolic...