A Ferritin test measures the level of ferritin, the primary intracellular protein that stores iron and releases it in a controlled fashion, providing a reliable estimate of the body’s iron reserves and helping clinicians assess iron deficiency or iron overload. Physicians in Mumbai commonly request ferritin when patients present with symptoms such as persistent fatigue, pallor, reduced exercise tolerance, hair loss, or when investigating unexplained anemia, chronic inflammation, or suspected haemochromatosis; ferritin is also used to monitor response to iron therapy and to guide transfusion or supplementation decisions. Because ferritin is an acute‑phase reactant, values can be elevated in infection or inflammation even when iron stores are low, so interpretation requires correlation with clinical findings and other tests such as complete blood count, serum iron, TIBC, and CRP when needed. With Seviyaar, residents across Mumbai can schedule ferritin testing performed by NABL‑certified laboratories via the lab tests booking platform, arrange professional home sample collection, and receive secure digital reports to support timely diagnosis and appropriate follow‑up care.