FTL Gene

Ferritin Light Chain (FTL) is a gene involved in iron storage that has been studied in relation to immune function, metabolism, and chronic illness. Variants in FTL may influence how the body responds to infection, inflammation, and long-term recovery.

This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.

What is the FTL gene?

FTL encodes ferritin light chain, a protein involved in iron storage. It belongs to the Metabolic category and is part of the Oxidative Stress biological cluster. FTL encodes ferritin light chain, the other component of the ferritin iron storage complex.

Biological role and pathway

FTL is involved in the iron storage pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Oxidative Stress cluster work together to maintain balanced function across interconnected biological systems.

Variants in genes within this pathway may influence an individual's predisposition to altered function in these systems — particularly under conditions of physiological stress such as viral infection or prolonged illness.

FTL and Long COVID / ME-CFS research

Ferritin (heavy + light chain) is a key marker of inflammation and iron dysregulation in Long COVID; FTL variants may affect iron storage capacity and hyperferritinemia in Long COVID.

This information is based on published research and does not constitute medical advice. See references below.

Known genetic variants

The following variants (SNPs) in the FTL gene have been studied in relation to metabolic and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

Conditions studied in relation to FTL

Research into FTL variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that FTL causes or treats any condition.

Genetic insights from DNA data

Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may include FTL and related genes in the oxidative stress pathway.

The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. Results are presented in plain English with appropriate scientific context, no medical jargon, no scare tactics. All results should be discussed with a qualified healthcare provider.

Related genes in the Oxidative Stress pathway

FTL does not act in isolation. The following genes are functionally related and may be analysed together for a more complete picture of your genetic predispositions.

Frequently asked questions

What is the FTL gene and what does it do?

FTL (Ferritin Light Chain) is involved in iron storage. FTL encodes ferritin light chain, the other component of the ferritin iron storage complex.

How may FTL gene variants relate to Long COVID or ME/CFS?

Ferritin (heavy + light chain) is a key marker of inflammation and iron dysregulation in Long COVID; FTL variants may affect iron storage capacity and hyperferritinemia in Long COVID.

Can a DNA test reveal information about my FTL gene?

Consumer DNA data from 23andMe, AncestryDNA, and MyHeritage includes SNP variants for many genes. ChronicDNA analyses your raw DNA file and reports on variants that have been studied in relation to chronic illness, immune function, and metabolism. This is not a diagnostic service — results are informational and educational only.

Explore your FTL genetic insights

Upload your DNA data from 23andMe, AncestryDNA, or MyHeritage and receive a personalised report covering >80 genes relevant to Long COVID and ME/CFS.

Get Your Personalised DNA Report

Informational and educational only · Not a diagnostic tool · GDPR compliant

References

The following publications were used in compiling the research context for FTL. This is not an exhaustive literature review.

  • [1]PMID: 32296168
  • [2]Nature Medicine
  • [3]Blood