Collagen and Elastin are both proteins that are critical constituents of skin.
They both gives the skin its strength and elasticity which is the unique property that allows the skin to snap back when stretched out.
When weight loss or body shape change (such as in pregnancy or body building) is moderate then skin will snap back in most instances without problems. There can be some stretch marks but the skin will snap back.
Collagen and Elastin are both proteins that are critical constituents of skin.
They both gives the skin its strength and elasticity which is the unique property that allows the skin to snap back when stretched out.
When weight loss or body shape change (such as in pregnancy or body building) is moderate then skin will snap back in most instances without problems. There can be some stretch marks but the skin will snap back.
With large amounts of weight gain, especially if for long periods of time, the skin is stretched out to beyond its limits. This mechanical stretch fractures the collagen and elasin fibres, leading to visble marks on the skin (stretch marks).
This damage can leave hanging redundant skin which can is no longer elastic.
This can effect the face and neck, arms, breasts, bra fat rolls, the lower back, buttocks, abdomen and thighs. The pattern of excess skin can be very variable.
On the body, the principle of treatment involves removing excess skin surgically. This is known as body contouring surgery and includes: