ferritin

noun

fer·​ri·​tin ˈfer-ə-tən 

: a crystalline iron-containing protein that functions in the storage of iron and is found especially in the liver and spleen

Examples of ferritin in a Sentence

Recent Examples on the Web

More recent research published in The Lancet Global Health found that iron stores begin depleting at ferritin levels around 40-50, meaning a woman can feel genuinely terrible at a ferritin of 20 and still be told everything is fine. —Allison Palmer, Charlotte Observer, 20 Mar. 2026

Iron levels: Vitamin C can help iron absorption and ferritin levels when consumed alongside iron-rich foods. —Cory Martin, Verywell Health, 21 Jan. 2026

Each person needs 1 gram of protein per kilogram of body weight daily for keratin renewal and adequate ferritin, zinc, and vitamins B, D and B-12 for healthy hair, Rossi says. —Asuka Koda, CNN Money, 14 Nov. 2025

If in doubt, an iron or ferritin blood test will confirm iron deficiency or anaemia. —Morgan Fargo, Vogue, 20 Aug. 2025

Word History

Etymology

International Scientific Vocabulary, alteration of ferratin, iron-containing protein, from Latin ferratus bound with iron (from ferrum) + International Scientific Vocabulary -in

First Known Use

1937, in the meaning defined above

Rhymes for ferritin

• keratin
• cytokeratin
• samaritan

Medical Definition

ferritin

noun

fer·​ri·​tin ˈfer-ət-ən 

: a crystalline iron-containing protein that functions in the storage of iron and is found especially in the liver and spleen compare hemosiderin