regulates regulates regulation of catabolic process regulation of collagen catabolic process biological_process regulation of collagen breakdown regulation of collagen catabolism Any process that modulates the rate, frequency or extent of collagen catabolism. Collagen catabolism is the proteolytic chemical reactions and pathways resulting in the breakdown of collagen in the extracellular matrix. regulation of collagen degradation GO:0010710 regulation of collagen metabolic process collagen catabolic process biological regulation