Consensus Report
Iron
Strong Consensus
out of 5
Based on 22 videos (32 hours analyzed) across the experts · Updated 2026-03-23
Expert Positions
The Verdict
All 5 experts acknowledge iron as essential, but the consensus is unusually nuanced: test first, supplement only if deficient, and monitor carefully. Attia provides the deepest biochemical coverage with a dedicated iron episode. Hyman includes iron bisglycinate in his personal daily stack and flags it as one of the most prevalent deficiencies. Johnson actively supplements heme iron for borderline levels. Patrick highlights excess iron as an aging accelerant. The universal theme is that iron is a double-edged sword — both deficiency and overload are dangerous.
Where They Disagree
Patrick's research focus highlights iron as an aging accelerant — excess iron drives protein aggregation and shortens lifespan in model organisms. This contrasts with Hyman's emphasis on widespread deficiency and the need for supplementation.
Hyman advocates ferritin levels >100 ng/mL as optimal (especially for restless legs), while standard lab ranges consider 12-150 ng/mL as normal. Attia notes that ferritin interpretation is complicated by its acute-phase reactant status.
+ 2 more disagreements in the full report
About This Analysis
This consensus report on Iron is based on 22 videos (32 hours analyzed) from five longevity experts: Andrew Huberman, Peter Attia, Rhonda Patrick, Bryan Johnson, and Mark Hyman. Each expert's position was independently analyzed from their published video content, including lectures, podcast episodes, and Q&A sessions with 1,000+ guest scientists.
The full report includes 8 key findings, dosage and protocol details, expert deep dives with direct video citations and timestamps, risk considerations, and related supplement synergies.
Frequently Asked Questions
What do experts agree on about iron?
All 5 experts acknowledge iron as essential, but the consensus is unusually nuanced: test first, supplement only if deficient, and monitor carefully. Attia provides the deepest biochemical coverage with a dedicated iron episode.
Where do the experts disagree on iron?
Patrick's research focus highlights iron as an aging accelerant — excess iron drives protein aggregation and shortens lifespan in model organisms. This contrasts with Hyman's emphasis on widespread deficiency and the need for supplementation. Hyman advocates ferritin levels >100 ng/mL as optimal (especially for restless legs), while standard lab ranges consider 12-150 ng/mL as normal. Attia notes that ferritin interpretation is complicated by its acute-phase reactant status. Johnson supplements with heme iron (animal-derived, higher bioavailability), while Hyman prefers iron bisglycinate (chelated, gentler on the gut). Both approaches address deficiency but differ in form.
How strong is the expert consensus on iron?
The consensus on iron scores 4.0/5 — a strong level of agreement across Huberman, Attia, Patrick, Johnson, and Hyman, based on their public videos.
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