The Extra Skin When fats tissue is worked and the cells decrease, wouldn't it make experience that your skin would reduce as nicely? Yes and no. In the cases of slight weight reduction, skin can clearly shrink back to fit the body's new size due to its elasticity because of collagen within the pores and skin. However, collagen does have its limits. Collagen fibers weaken with age and consequences in wrinkles. Rapid boom or weight advantage also outpaces collagen manufacturing within the pores and skin inflicting areas to over-stretch, main to stretch marks normally visible in being pregnant and youth going thru puberty.