This Special Issue on “Blood-Derived Products for Tissue Repair and Regeneration” reveals the evolution and diversity of platelet rich plasma (PRP) technologies, which includes experimental research on novel formulations, the creation of combination therapies, and the exploration of potential modifiers of PRPs, as well as efficacy of PRP therapies in clinical veterinary and human applications. Scientist and clinicians are now starting to develop different treatments based on their reinterpretation of the traditional roles of platelets and plasma, and the current Issue has provided a forum for sharing research and ways of understanding the associated medicinal benefits from different points of view. The research interest in this area has covered different medical disciplines, such as ophthalmology, dentistry, orthopedics, and sports medicine.