A composition, especially for treatment of aged and/or stressed skin, the composition containing, in addition to water, at least one substance that forms lamellar structures with water. The composition further contains S-adenosylmethionine and/or at least one compound that contains a functional group of the general formula --CH.sub.2--N.sup..sym.--(CH.sub.3).sub.3. The lamellar structure has a layer structure in which an upper layer of the substance is aligned with a lower layer, the hydrophilic groups of the substance each point outwards, and the lipophilic groups of the substance are aligned inwards with one another. The lamellar structure is surrounded by a hydrophilic medium, preferably water.