Iron

Expert Positions

Andrew Huberman

Context-Dependent

Peter Attia

Recommends Testing & Targeted Supplementation

Rhonda Patrick

Warns Against Excess; Supports Deficiency Correction

Bryan Johnson

Actively Supplements Heme Iron

Mark Hyman

Strongly Recommends Testing & Supplementation

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.