ฟีฟี having a desired size and fatty acid composition and may be stabilized by components such as ฟอสโฟไลปิด, คอเรสเตอรอล, milk-fat globule membrane
protein and combinations thereof. ในรุรุหนึ่ง, the ฟีฟี of the การเปิดเผยนี้ are similar in size to naturally occurring milk ฟีฟี.