Yon-Ka was founded in 1954 by botanist brothers Charles and Ernest Mühlethaler near Paris, France. Together they perfected a process for stabilising essential oils in water-based emulsions. This was the beginning of what would become Yon-Ka, a pioneer of esthetic aromatherapy and phytotherapy. Over the years Yon-Ka has established a reputation for consistently offering high-quality skin care products. The name Yon-Ka is a combination of two words: Yon and Ka. "Yon" is the name of a fast-flowing river filled with purifying water – the basis of all life and also the energy particle, the ion. "Ka" refers to the principle of regeneration in Egyptian mythology, the eternal part of the human soul that dwells in every being. The combined name is the symbol of continuous regeneration, restored harmony and the reconciliation of body and mind. The single objective of Yon-Ka is to "give your skin the means to regain its balance and vital energy at every age of life."

Yok-Ka’s philosophy centres on two key concepts, phytobiointegrity and personalised treatment. Phytobiointegrity refers to Yon-Ka’s desire to have skin derive maximal benefit from all that the plant world has to offer. Yon-Ka thus uses not only fragrant essential plant oils but many complementary ingredients contained in plant and marine extracts such as vitamins, trace elements and fruit acids. Yon-Ka promotes personalised treatment by offering products that help improve a variety of skin conditions and are suitable for virtually all skin types. Yon-Ka’s broad product line offering facilitates regimen personalisation.