In 2025, research peptides remain at the cutting edge of biomedical science driving discoveries in therapeutics, diagnostics, regenerative medicine, and more. As peptides grow in importance, several innovations are creating new opportunities but also raising important ethical, regulatory, and safety-related questions. Whether you're a seasoned researcher or someone exploring translational science, this guide highlights the top peptides and design strategies that are shaping this year’s landscape along with what to watch out for.