Dhru Purohit Show

Are You Taking Too Many Vitamins? The Critical Nutrients You Need and the Ones You Don’t Need As Much Of with Chris Kresser

Oct 6, 2025
Chris Kresser, a leading functional medicine clinician and author, dives into the complexities of nutrient supplementation. He emphasizes that more isn’t always better, particularly with vitamins like D and K2. Kresser explains the risks of over-supplementation and highlights the importance of getting nutrients from whole foods, especially nutrient-rich organ meats. He also shares practical tips on how to incorporate these foods into your diet and discusses common nutrient deficiencies and the impact of bioavailability on absorption.
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ADVICE

Safe Vitamin D Testing And Dosing

  • Test vitamin D and avoid long-term very high doses unless supervised.
  • Start with 2,000–4,000 IU/day and adjust by testing, using 40–60 ng/mL as a target range.
INSIGHT

Vitamin D Should Be Personalized

  • Individual vitamin D needs vary widely by genetics, skin, body composition, and location.
  • A personal vitamin D range is better than a one-size-fits-all target and 40–60 ng/mL fits most people.
ADVICE

Pair Vitamin D With Cofactors

  • Always pair vitamin D with cofactors like K2, magnesium, and vitamin A when supplementing.
  • These nutrients guide calcium to bones and reduce the risk of soft-tissue calcification and toxicity.
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