After the social media trend of ‘ferritin face’ had everyone scrutinising their face for pale skin, dark circles and sluggish features due to low iron levels, attention is now shifting to hair. Described as ‘ferritin hair’, social media users have been attributing symptoms like unusual hair shedding, thinning and brittle strands to the body’s low iron stores.The trend is not just a fluke. There is a medical basis for recognising iron deficiency in people facing hair loss. However, ‘ferritin hair’ is not a formal medical diagnosis. Hair loss can be due to several reasons, including hormonal changes, stress, thyroid disorders, nutritional deficiencies and genetic hair-loss conditions.So is there a connection between ferritin and hair health and which signs should prompt someone to seek medical advice?What Is Ferritin And How Is It Connected To Your Hair?Also read: Botox And Fillers: UK Watchdog Says Clinics Should Check Mental Health Before InjectingFerritin is a protein that stores iron in the body and releases it when needed. A blood ferritin test helps assess the body's iron reserves. Iron is essential for several functions, including the production of haemoglobin, which carries oxygen in the blood.When iron stores are exhausted, the body prioritises essential functions over those that are not absolutely necessary for survival. Hair growth may be affected in some people, contributing to increased shedding.A 2023 clinical review published in Cutis noted that measuring serum ferritin can be useful while evaluating people with diffuse hair loss, especially to identify underlying iron deficiency. A 2026 study published in Cureus reported that low serum ferritin and telogen effluvium in women may be connected. A separate systematic review published in 2026 also found lower ferritin levels among people with telogen effluvium. The European Food Safety Authority has also observed a cause-and-effect relationship between iron intake and the maintenance of normal hair growth. Possible Signs Of 'Ferritin Hair'Also read: Ditching Dairy For Oat, Almond Milk? Your Body Could Miss Out On These 4 Essential NutrientsHair shedding: One possible sign is diffuse hair shedding, in which more hair than usual falls from across the scalp rather than from one specific area. This can occur due to a condition called telogen effluvium, in which more hair follicles than usual enter the resting phase of the hair-growth cycle.Hair thinning: Constant shedding can make the hair appear less dense over time. Some people may notice a wider-looking parting or thinner volume.Dry or brittle hair: Iron deficiency may cause dry, brittle hair. However, hair texture can also be affected by heat styling, chemical treatments and other nutritional factors.Other symptoms: Hair shedding may occur with other signs of iron deficiency like fatigue, weakness, poor concentration, breathlessness, palpitations or pale skin. Causes Of Iron Deficiency Or Low Ferritin LevelsIron deficiency can develop when the body loses more iron than it absorbs and does not receive enough through diet. Heavy menstrual bleeding and pregnancy are common reasons for iron deficiency. Other possible causes include:Inadequate dietary iron: People who do not consume enough iron-rich foods are at risk if their diets are restrictive.Poor absorption: Conditions such as coeliac disease can interfere with the absorption of iron.Blood loss: Gastrointestinal conditions like gastritis and intestinal polyps can sometimes lead to iron loss.Increased requirements: Pregnancy can demand increased iron needs.