A significant part of science is plucking the true bits from common sense. A fair chunk of what we call medicine is folk remedies that stood up to rigorous testing.
Curious what you mean by this. There is very, very little medical knowledge today that aligns with historical folk wisdom.
(Even simple things like "an apple a day" - apples are fine, but foods like berries, kiwis and avocados tend to have both lower sugar and much higher nutritional content.)
