A healthy gut deserves the hype, too. A diverse gut microbiome, which is a key indicator of a healthy gastrointestinal tract, protects against unwelcome invaders, helps to optimize the extraction of nutrients and energy, and contributes to healthy immune function3. Yes, it means better digestion but also better mood and cognition and much more. And it’s a two-way street. Not only does vitamin D influence the gut, but the gut also influences vitamin D—particularly, how well it’s absorbed.* Previously thought to be a passive process, research suggests the absorption of vitamin D4 is affected by the upper digestive tract and proteins in the intestinal membrane. In other words, a healthier gut is able to absorb vitamin D more effectively. (That, and throwing some healthy fats in the mix.) But there is much more room for understanding. According to Gombart, this is an emerging area of research, and further studies will allow for a better and deeper knowledge of this important interaction. These sun-confounding factors include time of day, time of year, location, skin tone, wearing SPF, air pollution, and even age. Combined with the reality of our lives—which are mostly spent indoors, these factors make getting enough D from the sun unrealistic. When it comes to dietary sources of vitamin D, it’s not as simple as eating your vegetables. The only “veggie” (it’s really a fungus) that contains the essential nutrient is irradiated mushrooms, which are exposed to UV light to get their vitamin D2 (a significantly less potent form of vitamin D). Other modest sources of D include a list of animal products (like cod liver oil and eggs) and fortified foods like milk, O.J., and cereal. These are all fine, but the problem comes when you consider how much of those food items you actually need to consume for an optimal dose of 5,000 IU or more a day. According to mbg’s director of scientific affairs, Ashley Jordan Ferira, Ph.D., RDN, that shakes out to 294 cubes of Cheddar cheese or 7 cups of irradiated mushrooms every single day. (Yikes!) Unless you want to live on cubed cheese for the rest of your life, you might want to opt for an efficacious supplement that can do the trick—like mbg’s vitamin D3 potency+, which provides 5,000 IU of sustainable D3 derived from organic algae and organic olive, avocado, and flaxseed oils for optimal absorption, all in just one gelcap a day.*
