When we think of strong bones, we usually think of milk, a rich source of the nutrients that promote bone density: calcium and vitamin D. But we may be overlooking another important nutrient created closer to home—in our own gut, to be exact.
Vitamin K produced by certain types of bacteria that colonize the gut could also bolster bones, according to scientists Kyla Shea of the Vitamin K Laboratory at the USDA’s Human Nutrition Research Center on Aging (HNRCA) at Tufts University and Chris Hernandez of Cornell University’s Sibley School of Mechanical and Aerospace Engineering.