In the final episode of the “Know This Number?” series, Dr. Don Colbert, MD, is joined by Mary Colbert and Kyle Colbert to discuss the 13th and most vital number you need to know, Vitamin D levels. This conversation dives deep into why Vitamin D may be the most important vitamin for your immune system, bone health, and longevity. Dr. Colbert reveals why keeping your Vitamin D optimized can help support your body’s defense against viruses, strengthen your bones and muscles, and even reduce the risk of certain cancers. Mary and Kyle share personal stories about staying healthy during flu seasons and COVID through proper Vitamin D support. You’ll also learn the difference between Vitamin D2 and D3, how age, weight, and skin tone affect Vitamin D absorption, and why sun exposure and supplementation both play key roles in maintaining optimal levels. For optimal health, Dr. Colbert recommends pairing Vitamin D3 with Vitamin K2—a combination found in Divine Health’s Silical System, designed to help your body properly absorb and use calcium for stronger bones and a more resilient immune system. 👉 Shop Divine Health products: Silical System – Bone & Connective Tissue Support If you’ve been following the Know Your Number series, this finale wraps up the journey with powerful, actionable insights for living long and strong. Subscribe for more from Dr. Colbert, MD, and visit DivineHealth.com for premium supplements and wellness tools. Live Long and Strong.