Expert Answer
Does vitamin C actually boost immunity?
Quick Answer
Experts are mixed. Patrick has a dedicated deep-dive supporting it for immune and cardiovascular health. Hyman recommends it broadly. But Huberman notes limited cold effectiveness, and Attia argues mega-dosing offers no benefit beyond correcting deficiency.
Moderate Consensus
on Vitamin C overall
What Researchers Say
Most skeptical — mega-dosing offers no benefit beyond correcting deficiency. Oral absorption is severely limited.
Dedicated deep-dive covering oral vs IV forms. Recommends for immune and cardiovascular health.
Recommends broadly for immune support, stress, and detoxification across dozens of videos.
Includes in daily protocol alongside iron.
Detailed Answer
Vitamin C immunity benefits are real but overhyped. Patrick has a dedicated deep-dive supporting its immune and cardiovascular roles. Hyman recommends it broadly. Johnson takes it daily.
But Attia is the most skeptical, arguing that mega-dosing offers no benefit beyond correcting deficiency due to severely limited oral absorption. Huberman notes limited effectiveness for cold prevention.
The consensus: adequate vitamin C intake matters (eat fruits and vegetables), but mega-dosing 1000mg+ pills is unlikely to provide additional immune benefit for most people.
Related Questions
How much vitamin C should I take?
200-500mg from food and supplements covers most needs. Attia warns oral absorption plateaus around 200mg per dose.
Get the exact protocol for Vitamin C
This page covers what researchers agree on. Pro gives you the specific dosages, timing schedules, and interaction warnings they each recommend — with video citations you can verify.
- Expert-by-expert dosage breakdowns
- Chat with 1000+ hours of research data
- Video citations with timestamps you can check
Cancel anytime
Full Vitamin C Consensus Report
See what all 5 experts agree and disagree on