Vitamin deficiencies are associated with hair loss
the verdict
SUPPORTED
the evidence backs this
confidence 88/100
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.
Evidence for · 9
The role of micronutrients in alopecia areata: A Review
2017 · cited by 109
Reviews evidence that micronutrient and vitamin deficiencies represent modifiable risk factors associated with alopecia areata.
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More for · 8
Androgenetic Alopecia: A Review.
2024 · cited by 54
Notes that micronutrient deficiencies are frequently implicated in the pathophysiology of androgenetic alopecia.
Prevalence of Nutritional Deficiencies in Hair Loss among Indian Participants: Results of a Cross-sectional Study
2017 · cited by 43
Demonstrates through a cross-sectional study that various micronutrient and amino acid deficiencies are common in patients with hair loss.
Telogen effluvium in the new SARS‐CoV‐2 era
2021 · cited by 5
Identifies nutritional and micronutrient deficiencies (including vitamins D and B12 and iron) as triggering factors for telogen effluvium.
Scoping review of micronutrient imbalances, clinical manifestations, and interventions.
2025 · cited by 3
Lists deficiencies of vitamins and minerals as common clinical contributors to various pathological conditions including hair manifestations.
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 · cited by 2
Shows that personalized treatment of vitamin and trace element deficiencies improves hair parameters in patients with early androgenic alopecia.
Tracing the Connection of Iron and Copper in Chronic Telogen Effluvium
2024 · cited by 1
Identifies a positive association between iron deficiency and chronic telogen effluvium.
Association between iron deficiency and telogen effluvium: a systematic review and meta- analysis
2022 · cited by 1
Concludes via systematic review and meta-analysis that iron deficiency is associated with telogen effluvium.
Comparative Analysis of Postoperative Hair Loss and Micronutrient Deficiencies After One-Anastomosis Gastric Bypass Versus Sleeve Gastrectomy.
2026 · cited by 0
Finds that reduced iron and other micronutrient levels strongly predict postoperative hair loss following bariatric surgery.