The main factors that cause skin to sag are skin ageing and volume loss. Skin ageing is the loss of collagen, elastin and natural hydrators from your skin. It is a process that begins in your early twenties and becomes visible in your early thirties. Life-style factors such as smoking and sun exposure can affect the speed with which skin ages.

Anti-ageing skin treatments are based on the principle of stimulating skin repair and thus the production of new collagen, elastin and skin hydrators. Volume loss is the loss of subcutaneous fat (fat under the skin) and moisture, leaving the skin looking shrivelled, droopy and thin.