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Prostride is an excellent option for horseâs that 1-get joint injections repeatedly 2- horseâs with known joint injury 3- young horses 4-metabolic horses in which steroids are contraindicated 4-horses that have stopped responding well to traditional injections. Processed at your farmâ¦
prohormone. a precursor of a hormone, such as a polypeptide that is cleaved to form a shorter polypeptide hormone or a steroid that is converted to an active hormone by peripheral metabolism.Called also prehormone.bsolete term formerly used to designate a substance developed in serum that antagonizes a specific antihormone, and thus enhances the action of the corresponding hormone. /proÂ·horÂ·mone/ (-horÂ´mÅn) a hormone preprotein; a biosynthetic, usually intraglandular, hormone precursor, such as proinsulin.