Patent ID: 8137707

Claim:
A method of increasing cutaneous tissue longevity and cutaneous cellular longevity, comprising applying a Myrtus communis active principle having: a percentage of dry materials ranging between 20 and 200 g/L, a pH ranging between 3.0 and 6.0, a content of total sugars ranging between 5 and 64 g/L, and a content of total phenols ranging between 0.5 and 10.5 g/L to human skin, wherein the active principle is obtained by a method comprising: (a) solubilizing Myrtus communis leaf powder in water in acid medium to form a solution, (b) carrying out simultaneous and/or successive enzymatic hydrolysis/hydrolyses on the solution of (a), (c) separating the soluble and insoluble phases of the hydrolyzed solution of (b) by filtration, centrifugation or decantation, to obtain an enzyme-containing soluble phase, (d) inactivating the soluble phase of (c) by thermal treatment, (e) purifying by clarification, thereby providing an active fraction, (f) concentrating the active fraction to provide a concentrated solution of the active fraction, and (g) filtering the concentrated solution.