We’ve had Dr. Peat on the podcast before, and it actually ended up being our most downloaded WinAtLife podcast. So, we brought him back again to discuss vitamin D, calcium and mineral metabolism. There’s so much good information in this one! Dr. Peat offers up a lot of clarity when it comes to the great vitamin D debate. So, should you supplement vitamin D? Should you not? What else should you know when it comes to vitamin D and your metabolic health? As a reminder Vitamin D has many namesThe three most mentioned in this podcast areCholecalciferol also known as D3 (what is in food or supplements)"Stored D" also know as calcidiol / 25OHD /hydroxycholecalciferol"Active D" also know as calcitriol / 1,25DDr. Peat uses the references of 25OHD /hydroxycholecalciferol (stored) and 1,25D (active)In this episode we talk about...➡️ The purpose of Vitamin D➡️ How is vitamin D metabolised and stored➡️ How much D is too much? ➡️ The difference between Active and Stored Vitamin D➡️ Can "stored D" have active properties?➡️ Is elevated Active D (1,25D) a good thing?➡️ Do Vitamin D supplements suppress the immune system?➡️ The Vitamin D "receptor" theory-is it correct?➡️ Are blood levels of stored D (25OHD) correct?➡️ What are optimal stored Vitamin D levels?➡️ The relationship between D and Ca➡️ Understanding the importance of parathyroid hormone (PTH)➡️ What can affect PTH besides Calcium and Vitamin D➡️ What causes calcified tissue➡️ Understanding the calcium -magnesium connection➡️ What ratios, if any, are optimal for minerals?➡️ Understanding Hair Tissue Mineral Analysis? Are they accurate?Check out the entire podcast episode on Apple Podcasts, Spotify, Google Podcast, Stitcher, and iHeart Radio by searching for The Winatlife Podcast.At the end of the podcast, Ray was asked about a study involving Vitamin D supplements and Bone density.Here is the study and his answer:Effect of High-Dose Vitamin D Supplementation on Volumetric Bone Density and Bone StrengthA Randomized Clinical Trial. https://jamanetwork.com/journals/jama/fullarticle/2748796--i"They didn’t control their phosphate intake, so it’s possible that the high dose D was now and then increasing the 1,25-dihydroxy D, taking some calcium out of the bone. A problem with judging bone mineral content with x-rays is that, in stress, the fat in bone is reduced, and replaced by water, causing more of the x-rays to be absorbed, making the bone seem denser.   High-dose vitamin D without extra calcium supplementation has been associated with increased levels of the active vitamin D metabolite 1, 25(OH)2 vitamin D (calcitriol), and an increase in CTx."Buy Kates book: https://nustrength.myshopify.com/products/how-to-heal-your-metabolism-by-kate-deeringDiscount code: KATE10Follow Kitty on Instagram: @kittyblomfieldFollow Kate on Instagram: @katedeeringfitness