Skin ageing is a complex biological process that is influenced by endogenous factors (30 %) and exogenous factors (70 %). Endogenous skin ageing is genetically determined, whereas exogenous skin ageing is mainly environmentally triggered - by exposure to sunlight, smoking, or a poor diet and can be prevented. Strategies against ageing skin focus on antioxidants, nutrition, and hormonal factors. Vitamins, carotenoids, vitamin E, flavonoids, or plant extracts are offered in the form of either topical preparations or food supplements. Their effect is in some cases due to temporary skin smoothing as a result of the accumulation of water and structural molecules in the upper layer of the dermis, and in other cases it is due to the effects of protection against sunlight. Furthermore, the skin is a suitable model for general research into ageing. Studies have shown that the skin thickness and bone density of menopausal women are strongly correlated. In-vitro experiments with human sebaceous glands have shown modified signalling cascades in the context of hormone-induced ageing. These relate to the expression of steroid hormones and cytokines, as well as the involvement of genes that have a role in the inflammation and pathogenesis of neurogenerative disorders.