The Dr. Gundry Podcast

Are Your Supplements Actually Working? | EP 395.A

6 snips
Mar 18, 2026
A deep dive into which supplements often fail and why some are overrated. Explanations on calcium, iron, vitamin E, and vitamin C dosing pitfalls. Practical advice on probiotics, ketone sources, and why multivitamins may miss the mark. A listener question about vinegar syrups and a look at how study design can hide supplement benefits.
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ADVICE

Skip Calcium Pills Use Food Sources Instead

  • Avoid standalone calcium pills because they don't reliably send calcium to bones and may deposit it in blood vessels.
  • Get bioavailable calcium from foods like dark leafy greens and small fish with bones such as sardines and anchovies.
INSIGHT

RDAs Are Minimums Not Optimal Health Targets

  • Multivitamin RDAs are based on minimal deficiency prevention from a 1920s study of 20 college students, not optimal health levels.
  • Example: vitamin D RDA ~400 IU but UCSD research suggests ~9,600 IU to reduce cancer risk.
ADVICE

Use Timed Release Vitamin C For Continuous Coverage

  • Take continuous or timed-release vitamin C rather than a single daily tablet to maintain levels throughout the day.
  • Gundry personally takes 1,000 mg twice daily timed-release or suggests 500 mg four times daily for steady exposure.
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