LONDON — After snapping up Kate Somerville Skincare last month, Unilever has added another prestige brand to its stable, the professional skin-care brand Dermalogica. The brand will sit within the Unilever Prestige personal-care portfolio.

Dermalogica, used in salons and spas worldwide, was launched in 1986 in Los Angeles by Jane and Raymond Wurwand following the earlier creation of The International Dermal Institute in 1983, a training center for licensed skin-care therapists.

The terms of the deal have not been disclosed, although the founders have retained an interest in the company and will continue to work at the brand.

“Dermalogica enjoys an outstanding reputation and incredible awareness among skin-care professionals and consumers, alike, and has a clear positioning as a superior skin health brand that perfectly complements the rest of our Prestige offering,” said Paul Polman, Unilever’s chief executive officer.

Dermalogica is sold in more than 80 countries, and offers both a range of in-home products, and specialist ones for professional skin therapists. Its products aim to treat conditions such as hyperpigmentation, acne and sensitive skin.

“Thirty years ago, we launched Dermalogica with a clear and determined mission: to bring respect and success to the professional skin therapist,” Jane Wurwand said. “This mission is as important to us now as it was the first day we started the company….Raymond and I are excited to be working with Unilever. This partnership will provide Dermalogica with the opportunities and resources to take the brand to even greater heights.”

The brand had a turnover of $240 million in 2014.