Vitamin deficiencies are associated with hair loss
Multiple clinical studies, reviews, and meta-analyses demonstrate that vitamin and micronutrient deficiencies—particularly iron, zinc, and certain vitamins—are frequently associated with various forms of hair loss such as telogen effluvium and alopecia.
The claim that vitamin and micronutrient deficiencies are associated with hair loss is well-supported by numerous clinical reviews, observational studies, and meta-analyses showing correlations between low nutrient levels (such as iron, zinc, and vitamins D and B12) and conditions like telogen effluvium and alopecia areata. There are no papers in the retrieved set refuting this association.
Jordan M. Thompson, M. Mirza, M. Park, A. Qureshi, E. Cho. The role of micronutrients in alopecia areata: A Review. 2017. https://doi.org/10.1007/s40257-017-0285-x
Reviews evidence that micronutrient and vitamin deficiencies represent modifiable risk factors associated with alopecia areata.
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S. Oiwoh, A. Enitan, O. Adegbosin, A. Akinboro, E. Onayemi. Androgenetic Alopecia: A Review.. 2024. https://doi.org/10.4103/npmj.npmj_47_24
Notes that micronutrient deficiencies are frequently implicated in the pathophysiology of androgenetic alopecia.
Dinesh G Gowda, V. Premalatha, DB Imtiyaz. Prevalence of Nutritional Deficiencies in Hair Loss among Indian Participants: Results of a Cross-sectional Study. 2017. https://doi.org/10.4103/ijt.ijt_48_16
Demonstrates through a cross-sectional study that various micronutrient and amino acid deficiencies are common in patients with hair loss.
S. Ocampo-Garza, M. Vastarella, P. Nappa, M. Cantelli, G. Fabbrocini. Telogen effluvium in the new SARS‐CoV‐2 era. 2021. https://doi.org/10.1111/ijd.15482
Identifies nutritional and micronutrient deficiencies (including vitamins D and B12 and iron) as triggering factors for telogen effluvium.
English K, Uwibambe C, Daniels P, Dzukey E. Scoping review of micronutrient imbalances, clinical manifestations, and interventions.. 2025. https://doi.org/10.5662/wjm.v15.i4.107664
Lists deficiencies of vitamins and minerals as common clinical contributors to various pathological conditions including hair manifestations.
I. Kondrakhina, A. Zatevalov, E. R. Gatiatulina, A. A. Nikonorov, D. Deryabin, A. Kubanov. Evaluation of the Effectiveness of Personalized Treatment of Trace Element and Vitamin Status in Men with Initial Stages of Androgenic Alopecia Treated with Conservative Therapy. 2021. https://doi.org/10.15690/vramn1617
Shows that personalized treatment of vitamin and trace element deficiencies improves hair parameters in patients with early androgenic alopecia.
Shayan Zufishan, Sara Rafique, Faiza Nasir, Erum Amir, Shazia Nazar, Asma Bandhani. Tracing the Connection of Iron and Copper in Chronic Telogen Effluvium. 2024. https://doi.org/10.54393/pjhs.v5i05.1475
Identifies a positive association between iron deficiency and chronic telogen effluvium.
Xiaojing Kang, Jingzhan Zhang, Mengmeng Guan, Yuan Ding, Yunxia Ma, Tingting Li, Li Dai. Association between iron deficiency and telogen effluvium: a systematic review and meta- analysis. 2022. https://doi.org/10.21203/rs.3.rs-1519227/v1
Concludes via systematic review and meta-analysis that iron deficiency is associated with telogen effluvium.
Chinisaz F, Maleki T, Najjari K, Miratashi Yazdi SA. Comparative Analysis of Postoperative Hair Loss and Micronutrient Deficiencies After One-Anastomosis Gastric Bypass Versus Sleeve Gastrectomy.. 2026. https://doi.org/10.1007/s11695-026-08597-2
Finds that reduced iron and other micronutrient levels strongly predict postoperative hair loss following bariatric surgery.
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