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

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: podcast@mindbodygreen.com. *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. Learn more about your ad choices. Visit megaphone.fm/adchoices