negative regulation of collagen metabolic process
Any process that decreases the frequency, rate or extent of the chemical reactions and pathways resulting in the metabolism of collagen, any of a group of fibrous proteins of very high tensile strength that form the main component of connective tissue in animals.
GO:0009892
negative regulation of metabolic process
is_a
GO:0010712
regulation of collagen metabolic process
is_a
GO:0032963
collagen metabolic process
negatively_regulates