This episode is brought to you by Rupa University and AG1. Unfortunately, while almost never diagnosed, vitamin D deficiency affects over half of the population and has been linked to many cancers, high blood pressure, heart disease, diabetes, depression, fibromyalgia, chronic muscle pain, bone loss, and autoimmune diseases like multiple sclerosis. Vitamin D is almost totally absent from our food supply, and vitamin D deficiencies are the hidden cause of so much suffering—yet it is so easy to treat.  In today’s episode of my series I’m calling Health Bites, I talk about vitamin D deficiency, share my top strategies for optimal sun safety this summer, and much more. This episode is brought to you by Rupa University and AG1. If you’re a healthcare provider who wants to learn more about Functional Medicine testing, you owe it to yourself to go check it out today. Go to rupauniversity.com to sign up for a free live class or a boot camp! AG1 contains 75 high-quality vitamins, minerals, whole-food sourced superfoods, probiotics, and adaptogens to support your entire body. Right now, AG1 is offering 10 FREE travel packs with your first purchase by visiting drinkAG1.com/HYMAN. Here are more details from our interview (audio version / Apple Subscriber version): Sun exposure, cancer, and oxidative stress (3:20 / 00:50) Why we need vitamin D (4:40 / 3:26)  Vitamin D deficiency (5:05 / 4:12)  Optimal vitamin D levels and doses (7:34 / 5:35)  How your body makes vitamin D (10:59 / 9:19) Supplementing with vitamin D (12:29 / 10:53)  Protecting your skin from the sun (14:25 / 12:46)  Strategies for optimal sun safety (16:20 / 15:03)  Mentioned in this episode EWG’s Guide to Sunscreen EWG’s Skin Deep Learn more about your ad choices. Visit megaphone.fm/adchoices