The mindbodygreen Podcast

347: Vitamin D myths, the yo-yo effect & what to avoid in a supplement | Ashley Jordan Ferira, Ph.D., RDN


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Ashley Jordan Ferira, Ph.D., RDN: “Most standalone vitamin D3 products on the market are sub-efficacious doses...It’s like going to get a pumpkin spiced latte and they left out the latte part.” 

Ferira, mbg's Director of Scientific Affairs, joins mbg co-CEO, Jason Wachob, to discuss the biggest vitamin D myths she sees all the time, plus:

- How much vitamin D you need daily & what amount is too much

- How to maximize bioavailability

- What vegans should look for in a vitamin D supplement

- The link between vitamin D & fertility

- How to approach food vs. sunshine vs. supplementation for D sufficiency*

- How to make sure your vitamin D supplement actually works*


Referenced in the episode:

- Audio skip at 06:58: Ferira mentions biochemist & nutritionist Sir Edward Mellanby who discovered vitamin D in 1919. 

- A study on the link between vitamin D & erectile function.

- A study that 1 in 20 kids during the Roman Empire had rickets.

- Ferira's mbg article on why you can't get enough vitamin D from food alone.

- An mbg article on the difference between vitamin D2 & D3.

- Research showing a blood level less than 30 ng/ml is considered deficient.

- Research showing 1,000 IU of vitamin D per day raises blood levels by 10 ng/ml.

- An mbg article on factors that affect your individual response to vitamin D.

- A 2014 study showing 20,000 to 50,000 IU per day increase vitamin D levels without toxicity.


Don't forget to use the code D3POD to save 25% off mbg's vitamin D3 potency+ supplement. We've cracked the code to provide you with the latest in vitamin D3 technology—just one gel cap per day can help you achieve optimal vitamin D levels for life.* To learn more, visit mindbodygreen.com/d3pod.


Enjoy this episode! Whether it's an article or podcast, we want to know what we can do to help here at mindbodygreen. Let us know at: [email protected].


*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. 

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