Abstract: The invention concerns the use of sophorolipids in lactone form comprising a major part of diacetyl lactones as agent for stimulating skin dermal fibroblast cell metabolism and more particularly as agent for stimulating collagen neosynthesis, at a concentration of 0.01 ppm at 5% (p/p) of dry matter in formulation. The invention is applicable in cosmetology and dermatology.

Abstract: The use of at least one sophorolipid in cosmetics as an agent for stimulating the metabolism of fibroblasts of the dermis of the skin, particularly as an agent that restructures the skin, agent that repairs the skin, and/or an agent that tones up the skin.

Abstract: The present invention relates to a cosmetic and/or dermatological composition comprising at least one sophorolipid in its crude or acid form or associated with a monovalent or divalent salt. The concentrations of the sophorolipid can be 0.01% to 30% by weight. In particular, the composition is in the form of a water-in-oil emulsion, and oil-in-water emulsion or an oil-in-water microemulsion. The sophorolipid-based compositions of the invention have a free radical formation inhibiting activity, an elastase inhibiting activity, or an anti-inflammatory activity.