Garlic is recommended it as a palliative for the heat of the sun in field Labor.

http://en.wikipedia.org/wiki/Garlic

It was consumed by ancient Greek and Roman soldiers, sailors, and rural classes and, according to Pliny the Elder , by the African peasantry. Galen eulogizes it as the "rustic's theriac" (cure-all), and Alexander Neckam, a writer of the 12th century , recommends it as a palliative for the heat of the sun in field labor.

In the account of Korea's establishment as a nation, a tiger and a bear prayed to Hwanung that they may become human. Upon hearing their prayers, Hwanung gave them 20 cloves of garlic and a bundle of mugwort, ordering them to eat only this sacred food and remain out of the sunlight for 100 days. The tiger gave up after about twenty days and left the cave. However, the bear remained and was transformed into a woman.