The adipose tissue of the hypodermis is permeated by connective tissue (a network of collagen fibers) that encloses the adipose cell units. With increasing age, the collagen fibers lose their elasticity and fewer and fewer new ones are formed. This gradually weakens the connective tissue. As a result, the fat cells find less support. There is an uneven distribution of the fat cells in the connective tissue, which is noticeable as dents in the skin. A typical side effect of aging is weight gain. Not only are more fat cells formed, their size also increases. These enlarged fat cells not only cause more dents, they also squeeze the smallest blood vessels. The metabolism slows down and the formation of new collagen fibers also comes to a standstill. If nothing is done about it, the weakening of the connective tissue and thus the cellulite will continue to progress.