Facial slimming is much more common among people of Asian ancestry because of their predisposition to a more square and well-defined jawline due to a larger masseter muscle mass compared to people of European ancestry.

Facial slimming creates a more oval or more feminine shape to the face instead of a more square shaped or masculine type facial structure. An oval face is often seen as a characteristic of beauty and femininity. It also tends to make people look thinner despite there being no actual weight loss.