The gentle serum contains 10% mandelic acid, 3% hyaluronic acid and 0.2% chlorhexidine digluconate. Intensive treatment particularly well tolerated for oily and sebum overproduction prone skin or as a supplement to professional hyperpigmentation treatments. The mandelic acid contained regulates sebum production, has an exfoliating, cleansing effect and relieves redness. The hyaluronic acid provides intensive moisture and forms a protective barrier on the skin surface, which keeps the skin protected from dehydration. Chlorhexidine digluconate has a bacteriostatic and cleansing effect. The use of nanotechnology allows the active ingredients to penetrate the inner layers of the skin, increasing the effect of the preparations.