Several factors contribute to the loss of skin elasticity:

Ageing

As skin ages, it undergoes a decline in two crucial proteins found in the dermis: elastin and collagen. Elastin provides skin with its elasticity, enabling it to bounce back when stretched. Collagen, produced by fibroblasts, maintains skin's structure and firmness with tightly-woven fibers. The production of both proteins decreases with age and can be further degraded by external factors like:

UV exposure

Environmental pollutants, including cigarette smoke Certain lifestyle choices such as poor nutrition and excessive alcohol consumption.

Neglecting skin care and overall health accelerates skin aging, resulting in premature sagging and wrinkles.

Weight Loss

Extended periods of carrying excess weight can damage collagen and elastin fibers in the skin. When weight is lost, especially rapidly as after bariatric surgery or significant weight loss of 100 pounds or more, the skin may struggle to retract fully. This can lead to significant amounts of sagging, particularly if weight loss occurs at a younger age when skin elasticity is more resilient.

Pregnancy

During pregnancy, it's common to experience some degree of saggy, loose skin, especially around the abdomen. Women carrying multiples or older mothers may notice more pronounced sagging due to the skin's prolonged stretching.