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Lower serum ferritin levels within the normal range are strongly correlated with greater RLS symptom severity in drug-naive patients

In 113 drug-naive idiopathic RLS patients with serum ferritin within the laboratory reference range (22-322 μg/L), multiple regression analysis showed ferritin level (p < 0.001) and age (p = 0.001) were independent predictors of symptom severity. The median ferritin was 51.4 μg/L, and a very strong negative correlation was found between ferritin and RLS severity scores.

1 min read•Updated Jul 7, 2026•0 RCTs•View structured evidence →
Evidence Score34/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism☆☆☆☆☆
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Confidencelow

This article is automatically generated from the structured evidence profile behind the claim above. Scores reflect the quality and quantity of available research, not clinical advice.

Lower serum ferritin levels within the normal range are strongly correlated with greater RLS symptom severity in drug-naive patients The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).

The Claim

Lower serum ferritin levels within the normal range are strongly correlated with greater RLS symptom severity in drug-naive patients

This conclusion is most relevant to: 113 drug-naive patients with idiopathic RLS and normal ferritin levels (22-322 μg/L), mean age 52 ± 13.8 years.

What the Research Shows

The conclusion draws on 1 linked study. Highlights from the cited literature:

  • ▸Is "normal" ferritin truly enough? Strong correlation between iron stores and RLS severity in patients with normal ferritin levels. (Sleep medicine, 2026) —

How It Works

The proposed biological pathway:

  • ▸Low peripheral iron stores (ferritin) reduce brain iron availability
  • ▸Decreased brain iron impairs dopamine synthesis and function
  • ▸Dopaminergic dysfunction in sensorimotor pathways triggers RLS symptoms
  • ▸Result: Lower ferritin correlates with more severe RLS symptoms

Who Might Benefit

Evidence fit by population:

  • ▸113 drug-naive patients with idiopathic RLS and normal ferritin levels (22-322 μg/L), mean age 52 ± 13.8 years

Limitations & Caveats

Important context when interpreting this evidence:

  • ▸Cross-sectional design cannot establish causality
  • ▸Single-center study with relatively small sample size (n=113)

References

  1. 1.Tano&#x11f;lu C, Ersoy A. “Is "normal" ferritin truly enough? Strong correlation between iron stores and RLS severity in patients with normal ferritin levels..” Sleep medicine, 2026. PMID: 42119338 DOI: 10.1016/j.sleep.2026.109008
Disclaimer: This article is auto-generated from structured research data for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.