Nourishing Traditions work on keeping our values and folklore wisdom alive. Values which are coming from generations and are somewhat loosing their worth under capitalism, industrialism and big pharma. What families knew way before, now learn from a schooling system. It doesn't benefit them, despite with some side effects. When they again unlearn them, and regain knowledge from their observation, common sense & logic.
Abu Huraira reported God’s messenger as saying:
“The stomach is the tank of the body and the veins go down to it. When the stomach is healthy the veins come back in a healthy condition, but when it is in a bad condition they return diseased.” Reference : Mishkat al-Masabih 4566
In-book reference : Book 23, Hadith 51