Our grandmothers and great-grandmothers had it right! Bone broth is one of the most nutritive and healing foods out there. It’s made by heating bones, low-n-slow, for at least 24 hours. That time allows all of the minerals in the bones to leach out into the water and the marrow that is found inside the bones to work its way into the water as well, giving it its nutrient-dense healing powers.