In feedback inhibition,a metabolic pathway is switched off by

competitive inhibition
denaturation
accumulation of end product
allosteric inhibition

accumulation of end product which causes allosteric inhibition

accumulation of end product. end product control the initiating phase of the reaction. means end product give feed back to the first step for stopping or moving forward the the reaction.

accumulation of end product. once there's an abundance of the end product it will shut off to not waste the product or cause problems