The 3 chloro 1,2 propane diol which is generated at the time of refining the edible oil (below 3MCPD) the formation material (below 3MCPDFS) it discloses with the manner which is decreased and the edible oil which contains 3MCPDFS which is decreased. Especially, the manner which decreases the concentration of 3MCPDFS below 0.3ppm by controlling the chlorine ion which is included in the tap water which is used with edible oil refinement is offered, the content of 3MCPDFS is made to decrease markedly by comparison with the known typical edible oil in related technology with that. The effect which simultaneously as for this invention, while maintaining quality such as taste and color high, possesses with, that offers the edible oil which a higher reliability and security for the consumer says and is superior is achieved.食用油の精製において発生する3-クロロ-1,2-プロパンジオール(以下「3-MCPD」)形成物質(以下「3-MCPD-FS」)を低減する方法と、低減された3-MCPD-FSを含有する食用油とを開示する。特に、食用油精製で使用される水道水に含まれる塩素イオンを制御することによって3-MCPD-FSの濃度を0.3ppm以下に低減する方法を提供し、それによって関連技術における既知の典型的な食用油と比較して3-MCPD-FSの含有量を格段に減少させる。同時に本発明は、味、色などの品質を高く保ちつつ、消費者にとってより高い信頼性と安全性とを有する食用油を提供するという優れた効果を達成する。
