The present disclosure is drawn to compositions and methods of making and using lyophilized platelet lysates. Specifically, a method of preparing a composition suitable for therapeutic use or as a culture medium can comprise steps of concentrating platelets from a platelet source to form a platelet rich portion of the platelet source, and lysing the platelets in the platelet rich portion to form a plurality of lysates. An additional step includes lyophilizing the lysates to form lyophilized platelet lysates in a composition with released concentrations of available growth factors, cytokines, and chemokines. In one example, at 30%, by platelet count, of platelets from a platelet source can be lysed using this process.