In this episode, I welcome back Dr. Jim Stephenson Jr., a dedicated citizen researcher who has spent years investigating the complexities of vitamin D3 supplementation. After a personal journey spurred by his wife's health challenges, Jim discovered that the common advice to supplement with D3, K2, and magnesium didn’t yield the results they hoped for. Today, we’ll explore his groundbreaking insights into how D3 functions in the body, its various metabolites, and the real implications of sun exposure. Join us as we tackle lingering questions and examine the role of vitamin D3 in health and disease, along with the surprising risks of supplementation. Timestamps:  00:00:00 - Introduction   00:05:02 - Jim’s Background   00:07:01 - Vitamin D Deficiency   00:09:12 - Phlebotomy and Blood Testing   00:10:30 - Types of Vitamin D Testing   00:12:40 - Jim’s Molecular Research   00:18:37 - Anti-Cancer Pathway   00:20:16 - UVA and Cancer Prevention   00:21:20 - Sunscreen and Showering After Sun Exposure   00:22:29 - Tracking Your Sun Exposure   00:28:01 - D3 Variation   00:29:21 - D3 Levels and Disease   00:31:06 - You Can’t Supplement the Sun   00:33:27 - Vitamin K2, Magnesium, and D3   00:36:53 - Pregnancy and D3   00:38:13 - Vitamin D3 Drops for Babies   00:44:24 - Vitamin Deficiencies and Disease Correlation   00:46:24 - Vitamin D3 Supplement Side Effects   00:50:33 - Benefits of Sunlight   00:51:55 - Melatonin and Vitamin D   00:53:51 - Sun Lamps in Winter   00:55:41 - Health Risks of Supplementation   00:57:57 - Pathogens and Vitamin D   01:01:03 - Vitamin D and Your Gut   01:04:27 - Vitamin D and Sulfate Sponsored By:  Bon Charge Click here & use code for SARAHKLEINER for 15% off storewide. SiPhox Health Visit siphoxhealth.com/sarah to get 20% off at-home cortisol and blood testing and begin working toward a healthier you. Upgraded Formulas: Use code: YOGI for 10% off at www.upgradedformulas.com Viva Rays Go to vivarays.com & use code: YOGI to save 15% Show Links ⁠Previous Interview With Jim Stephenson Jr ⁠ Check Out Jim:  Substack Facebook This video is not medical advice & as a supporter to you and your health journey - I encourage you to monitor your labs and work with a professional! ________________________________________ Check out my new app!  On Apple  & Android  Get all my free guides and product recommendations to get started on your journey! https://www.sarahkleinerwellness.com/all-free-resources Check out all my courses to understand how to improve your mitochondrial health & experience long lasting health! (Use code PODCAST to save 10%) -  https://www.sarahkleinerwellness.com/courses Sign up for my newsletter to get special offers in the future! -https://www.sarahkleinerwellness.com/contact Free Guide to Building your perfect quantum day (start here) - https://www.sarahkleinerwellness.com/opt-in-9d5f6918-77a8-40d7-bedf-93ca2ec8387f My free product guide with all product recommendations and discount codes: https://www.sarahkleinerwellness.com/resource_redirect/downloads/file-uploads/sites/2147573344/themes/2150788813/downloads/84c82fa-f201-42eb-5466-0524b41f6b18_2024_SKW_Affiliate_Guide_1_.pdf