ぞくせつ
common saying; popular version; folklore; tradition
Noun
俗説ぞくせつで「玉たまレタスを4分ぶんの1程度ていど食たべると眠ねむくなる」と言いわれ、韓国かんこくでは仕事しごと前まえのドライバーが食たべてはいけない食たべ物ものとして知しられている。
In Korea, there's a popular theory that says that: "If you eat a quarter of an Iceberg lettuce, you will fall asleep". Thus, amongst truck drivers in Korea, lettuce is known as something that should not be eaten before work.