Consensus Report
Vitamin C
Moderate Consensus
out of 5
Based on 182 videos (134 hours analyzed) across 5 experts · Updated 2026-03-23
Expert Positions
The Verdict
3 of 5 experts view vitamin C as broadly useful — Patrick has a dedicated deep-dive covering oral vs. IV forms, Hyman recommends it across dozens of videos for immune support, stress, and detox, and Johnson includes it in his daily protocol alongside iron. Huberman notes that high-dose vitamin C has shown limited effectiveness for colds. Attia is the most skeptical, arguing that mega-dosing offers no benefit beyond correcting deficiency and that oral absorption is severely limited.
Where They Disagree
Mega-dosing effectiveness: Patrick presents extensive evidence for vitamin C's broad benefits at moderate doses and acknowledges IV vitamin C's therapeutic potential for sepsis and cancer. Attia argues that Linus Pauling's high-dose advocacy was misguided and that oral supplementation is fundamentally limited by gut absorption — beyond correcting deficiency, more is not better.
Importance for colds and flu: Hyman strongly recommends vitamin C alongside zinc and vitamin D as a core flu-prevention stack. Huberman counters that high-dose vitamin C has shown limited effectiveness for colds, preferring zinc (90-100mg) and NAC as more evidence-based immune interventions.
+ 2 more disagreements in the full report
About This Analysis
This consensus report on Vitamin C is based on 182 videos (134 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.
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