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Later, in the 16th and 17th
centuries, herbal treatments became official medical practice
under the "Doctrine of Signatures," and various plants
were prescribed due to their resemblance to a particular body
part. Hence, the walnut, with its visual likeness to the human
brain, was used to treat head ailments, boost intellect and calm
emotions.
Even today, in Asian cultures,
the walnut is considered a brain food; college students there
munch on walnuts by the handful before exams, hoping to boost
their scores. Source: walnut.org |
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