204. Intestinal Barrier Function, The Gut-Immune Axis, & Vitamin D3 | 1,25-dihydroxyvitamin D₃

In this encore episode, we highlight vitamin D₃ in gastrointestinal health, with a focus on intestinal barrier function and the gut-immune axis. We discuss how vitamin D is metabolized into its active form, 1,25-dihydroxyvitamin D, and how 1,25-dihydroxyvitamin D can support intestinal health, while highlighting intestinal mucosal anatomy.Topics:1. Introduction - Highlighting intestinal barrier function and the gut-immune axis with a focus on vitamin D₃ 2. Vitamin D Synthesis and Metabolism - Skin and 7-dehydrocholesterol; dietary intake.- Transported through the bloodstream bound to vitamin D binding protein.- First hydroxylation in the liver to form 25-hydroxyvitamin D₃ (25(OH)D₃).- Testing.- Second hydroxylation in the kidney to form the active 1,25 dihydroxyvitamin D₃ (1,25(OH)₂D₃).- Local activation also occurs. 3. Intestinal Barrier Anatomy - The intestinal epithelium forms a selectively permeable monolayer that interfaces with the gut lumen.- Covered by a mucus layer.- Tight junction proteins and paracellular permeability.- The lamina propria and Gut-Associated Lymphoid Tissue (GALT). - Maintaining tolerance.  4. Vitamin D - 1,25-dihydroxyvitamin D₃, tight junction integrity, immune regulation, and more. 5. Vitamin D₂ and D₃  6. Conclusion - Neither too high nor too low: optimal levels.- Multifactorial: Numerous factors regulate vitamin D levels.- Gastrointestinal health root cause approach.Thank you to our episode sponsor: 1. "⁠Longevity⁠" with Protein, Probiotics, Bovine Colostrum, Collagen, and More. Use code ⁠CHLOE⁠ for 25% off.*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.Thanks for tuning in!Follow Chloe on Instagram ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠@synthesisofwellness⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠Visit ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠synthesisofwellness.com⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠