This episode is brought to you by. Rupa University, AG1, and Pendulum.  Up to 90 percent of the population have an inadequate intake of vitamin D and around 40 percent are deficient. Vitamin D, which works closely with magnesium, is a steroid hormone and is critical for proper immune function. It also helps support healthy inflammation levels and is important for supporting bone health, improving mood, reducing cancer risk, and reducing the severity of illnesses, including respiratory illnesses. In today’s episode, I talk with Dr. Elizabeth Boham and Max Lugavere about why your vitamin D level matters and how to increase it. Dr. Elizabeth Boham is a physician and nutritionist who practices Functional Medicine at The UltraWellness Center in Lenox, MA. Through her practice and lecturing she has helped thousands of people achieve their goals of optimum health and wellness. She witnesses the power of nutrition every day in her practice and is committed to training other physicians to utilize nutrition in healing. Max Lugavere is a health and science journalist and the author of the New York Times bestseller Genius Foods: Become Smarter, Happier, and More Productive While Protecting Your Brain for Life, now published in 10 languages around the globe. His sophomore book, also a bestseller, is called The Genius Life: Heal Your Mind, Strengthen Your Body, and Become Extraordinary. Max is the host of a number one iTunes health and wellness podcast called The Genius Life. His new cookbook, Genius Kitchen, just hit the shelves. Max appears regularly on The Dr. Oz Show, The Rachael Ray Show, and The Doctors. He has contributed to Medscape, Vice, Fast Company, CNN, and The Daily Beast and has been featured on NBC’s Nightly News and The Today Show and in the New York Times and People magazine. He is an internationally sought-after speaker and has given talks at South by Southwest, the New York Academy of Sciences, the Biohacker Summit in Stockholm, Sweden, and many others. This episode is brought to you by Rupa University, AG1, and Pendulum. If you’re a healthcare provider who wants to learn more about Functional Medicine testing, go to rupauniversity.com to sign up for a free live class or a boot camp! Head to drinkAG1.com/HYMAN to receive 10 FREE travel packs of AG1 with your first purchase. Pendulum is offering my listeners 20% off their first month of an Akkermansia subscription with code HYMAN. Head to pendulumlife.com to check it out. Full-length episodes of these interviews can be found here: Do You Need to Take Vitamin D? Supplements: Useful or Useless? How to Fix Your Brain and Live a Genius Life Underweight, Overtired, and Malnourished: How to Get Your Health Back on Track