Herbal extracts for the HAS-stimulation, in particular for HAS2 stimulation

The invention relates to plant extracts that stimulate the synthesis of hyaluronan and, in particular the synthesis of hyaluronan synthase 2 (HAS2). The invention particularly relates to the use of an effective amount of at least one extract of a plant selected from Guarana (Paullinia cupana), St. John's Wort (Hypericum hircinum), bamboo (Bambusa vulgaris), mung bean (Phaseolus aureus), blackcurrant (Ribes Uvacrispa L.), pungent mice Dorfn (Ruscus aculeatus), broad bean (Vicia faba equina), pea (Pisum sativum), narrow-leaved lupine (Lupinus angustifolius), ephedra (Ephedra sinica), vulgar tansy (Tanacetum vulgare), large galangal (Alpinia galanga), white mulberry ( Morus alba), Brazzein (Pentadiplandra brazzeana) and any mix of the foregoing. The invention has particular to increase the object, the strength and / or elasticity and / or hydration of the tissue and / or to increase the skin barrier effect and / or to increase the resilience of the tissue and / or to modulate angiogenesis, or the creation of new improve blood capillaries and / or scarring and / or cellular proliferation, migration, differentiation and / or cutaneous atrophy and / or is intended to combat the effects of aging on the skin and in particular the loss of skin firmness, which over the aging is observed and / or atrophic scars.