Exploratory Analysis of Serum IGF-I Levels and Symptom Trajectories in Long COVID During the Omicron Period.

Publication date: May 11, 2026

Background: Although several risk factors have been reported for long COVID (LC), reliable biomarkers for this illness remain lacking. Insulin-like growth factor (IGF)-I, a major mediator of growth hormones, plays an important role in metabolism, neuroprotection, and systemic homeostasis, and therefore may be useful in predicting the severity and prognosis of LC. Methods: This study included patients who visited a specialized clinic for long COVID between 2022 and 2025 during the Omicron period and had serum IGF-I measurements taken. IGF-I levels were expressed as age- and sex-adjusted standard deviation scores (IGF-I SD), and patients were classified into low (SD

Concepts Keywords
Depressive COVID-19
Insulin fatigue
Laboratory IGF-I
Reliable long COVID
recovery

Semantics

Type Source Name
disease MESH Long COVID
pathway REACTOME Metabolism
disease MESH included
disease MESH fatigue
drug DRUGBANK Sodium lauryl sulfate
disease MESH SDS
disease MESH COVID-19

Original Article

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