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Primary topic: HFE gene DNA analysis

HFE Gene and Metabolism: What It Can Mean in a Pathway Report

HFE becomes more useful when iron handling looks like a meaningful follow-up area instead of just background context.

What is the HFE gene?

HFE contributes to iron storage and absorption signaling. That makes it more useful as part of a pathway view than as an isolated SNP call.

How HFE affects metabolism

If HFE-related support is less favorable, the pathway can look more pressured under load and the linked biomarkers become more useful to validate directly.

What happens when HFE is altered

An altered HFE pattern does not diagnose anything on its own, but it does change which follow-up markers deserve attention first.

Curated SNP evidence for HFE

These SNPs come from the approved study-level evidence model. Each claim is scored from curated study rows, then gated before it can influence pathway scoring.

Iron handling

Evidence-backed report connection

HFE currently has 2 curated SNPs, 6 claim-level scores, and 3 claims eligible for pathway scoring.

Open the sample report
rs1799945H63D3 claims · 9 study rows

biomarker tendency · GG

HFE biomarker tendency

Moderate

rs1799945 GG is associated with increased HFE biomarker tendency.

HFE rs1799945 is scored as a small tendency toward higher iron-related biomarkers when the G allele is present, with the largest simplified score for GG.

Likely effectHigher biomarker tendency
Signal sizeSmall signal
Evidence supportModerate support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP places rs1799945 in HFE and annotates the common G allele as NM_000410.4:c.187C>G, a His63Asp missense change. This supports scoring G-containing genotypes as the H63D coding-change genotypes for this simplified record.PubMed 14648375biomarker association · close proxyA first-time blood donor study genotyped HFE C282Y and H63D and compared ferritin and transferrin saturation with matched controls. The study found clearer transferrin-saturation elevation for C282Y-containing genotypes than for H63D alone, supporting only a small iron-biomarker tendency for rs1799945 by itself.PubMed 24729993biomarker association · close proxyA study focused on H63D homozygotes concluded that H63D may relate to altered iron indexes, but the penetrance for iron-overload-related disease is low. This supports a low-magnitude, modest-certainty biomarker score for GG rather than a strong clinical interpretation.

biomarker tendency · CG

HFE biomarker tendency

Not used for pathway scoring

rs1799945 CG is associated with increased HFE biomarker tendency.

HFE rs1799945 is scored as a small tendency toward higher iron-related biomarkers when the G allele is present, with the largest simplified score for GG.

Likely effectHigher biomarker tendency
Signal sizeSmall signal
Evidence supportModerate support
Report useEvidence only, not scored
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP places rs1799945 in HFE and annotates the common G allele as NM_000410.4:c.187C>G, a His63Asp missense change. This supports scoring G-containing genotypes as the H63D coding-change genotypes for this simplified record.PubMed 14648375biomarker association · close proxyA first-time blood donor study genotyped HFE C282Y and H63D and compared ferritin and transferrin saturation with matched controls. The study found clearer transferrin-saturation elevation for C282Y-containing genotypes than for H63D alone, supporting only a small iron-biomarker tendency for rs1799945 by itself.PubMed 24729993biomarker association · close proxyA study focused on H63D homozygotes concluded that H63D may relate to altered iron indexes, but the penetrance for iron-overload-related disease is low. This supports a low-magnitude, modest-certainty biomarker score for GG rather than a strong clinical interpretation.

biomarker tendency · CC

HFE biomarker tendency

Not used for pathway scoring

rs1799945 CC has no scored directional claim for HFE biomarker tendency.

HFE rs1799945 is scored as a small tendency toward higher iron-related biomarkers when the G allele is present, with the largest simplified score for GG.

Likely effectNo clear biomarker tendency
Signal sizeMinimal signal
Evidence supportVery limited support
Report useEvidence only, not scored
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP places rs1799945 in HFE and annotates the common G allele as NM_000410.4:c.187C>G, a His63Asp missense change. This supports scoring G-containing genotypes as the H63D coding-change genotypes for this simplified record.PubMed 14648375biomarker association · close proxyA first-time blood donor study genotyped HFE C282Y and H63D and compared ferritin and transferrin saturation with matched controls. The study found clearer transferrin-saturation elevation for C282Y-containing genotypes than for H63D alone, supporting only a small iron-biomarker tendency for rs1799945 by itself.PubMed 24729993biomarker association · close proxyA study focused on H63D homozygotes concluded that H63D may relate to altered iron indexes, but the penetrance for iron-overload-related disease is low. This supports a low-magnitude, modest-certainty biomarker score for GG rather than a strong clinical interpretation.
rs1800562C282Y3 claims · 9 study rows

biomarker tendency · AA

HFE biomarker tendency

Strong

rs1800562 AA is associated with increased HFE biomarker tendency.

HFE rs1800562 is scored as a higher iron-biomarker tendency when the A allele is present, strongest for AA and smaller for AG.

Likely effectHigher biomarker tendency
Signal sizeSmall signal
Evidence supportStrong support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP places rs1800562 in HFE and annotates the common A allele as NM_000410.4:c.845G>A, a Cys282Tyr missense change. This supports scoring A-containing genotypes as the C282Y coding-change genotypes for this simplified record.PMC8394043biomarker association · close proxyIn a referred hyperferritinemia cohort, C282Y homozygotes showed the clearest hemochromatosis-like biochemical pattern, including high median transferrin saturation and higher ferritin in men compared with other HFE genotypes. This supports a strong higher iron-biomarker tendency for AA.PubMed 14648375biomarker association · close proxyA first-time blood donor study found transferrin saturation was elevated in C282Y heterozygotes compared with wild-type controls. This supports a smaller higher iron-biomarker tendency for AG than for AA.

biomarker tendency · AG

HFE biomarker tendency

Moderate

rs1800562 AG is associated with increased HFE biomarker tendency.

HFE rs1800562 is scored as a higher iron-biomarker tendency when the A allele is present, strongest for AA and smaller for AG.

Likely effectHigher biomarker tendency
Signal sizeSmall signal
Evidence supportModerate support
Report useIncluded in pathway scoring
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP places rs1800562 in HFE and annotates the common A allele as NM_000410.4:c.845G>A, a Cys282Tyr missense change. This supports scoring A-containing genotypes as the C282Y coding-change genotypes for this simplified record.PMC8394043biomarker association · close proxyIn a referred hyperferritinemia cohort, C282Y homozygotes showed the clearest hemochromatosis-like biochemical pattern, including high median transferrin saturation and higher ferritin in men compared with other HFE genotypes. This supports a strong higher iron-biomarker tendency for AA.PubMed 14648375biomarker association · close proxyA first-time blood donor study found transferrin saturation was elevated in C282Y heterozygotes compared with wild-type controls. This supports a smaller higher iron-biomarker tendency for AG than for AA.

biomarker tendency · GG

HFE biomarker tendency

Not used for pathway scoring

rs1800562 GG has no scored directional claim for HFE biomarker tendency.

HFE rs1800562 is scored as a higher iron-biomarker tendency when the A allele is present, strongest for AA and smaller for AG.

Likely effectNo clear biomarker tendency
Signal sizeMinimal signal
Evidence supportVery limited support
Report useEvidence only, not scored
Show study evidence
NCBI RefSNP recordidentity only · unknownNCBI RefSNP places rs1800562 in HFE and annotates the common A allele as NM_000410.4:c.845G>A, a Cys282Tyr missense change. This supports scoring A-containing genotypes as the C282Y coding-change genotypes for this simplified record.PMC8394043biomarker association · close proxyIn a referred hyperferritinemia cohort, C282Y homozygotes showed the clearest hemochromatosis-like biochemical pattern, including high median transferrin saturation and higher ferritin in men compared with other HFE genotypes. This supports a strong higher iron-biomarker tendency for AA.PubMed 14648375biomarker association · close proxyA first-time blood donor study found transferrin saturation was elevated in C282Y heterozygotes compared with wild-type controls. This supports a smaller higher iron-biomarker tendency for AG than for AA.

Common symptoms people report

  • iron handling can overlap with more persistent symptom patterns
  • marker-driven follow-up may matter more than generic advice
  • mixed responses can make the pathway easier to miss without structured review

Biomarkers to validate

Ferritin

Primary follow-up marker for HFE inside iron handling.

Related pathway markers

Useful when the pathway needs to be validated as a system rather than as one variant.

Where DNA analysis helps

DNA helps decide whether HFE should move iron handling higher on the follow-up list before broad interventions are assumed.

Example interpretation

HFE can strengthen the case for iron handling follow-up when the rest of the pathway points in a similar direction.

Suggested validation: Ferritin.

What to do next

  • Use Ferritin and pathway context before assuming the gene matters in practice.
  • Read HFE alongside the related genes in the same pathway instead of as a standalone result.

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How accurate are DNA metabolism reports?

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Related symptom angle

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