<p>Ribosomal-inactivating proteins represent a fascinating class of enzymes with multiple functions in nature, serving as a potent defense mechanism in plants and, intriguingly, holding promise for innovative applications in research. They are sometimes considered toxins that hinder protein synthesis, mostly through <i>N</i>-glycosylase activity for depurination of a specific adenine residue in the conserved α-sarcin/ricin loop (α-SRL) of rRNA, and important anchoring elongation factor in mRNA translocation by interaction with ribosomes. This ability effectively incapacitates ribosomes, positioning ribosomal-inactivating proteins as powerful agents in deterring predators and thwarting microbial threats. Because of their distinctive biotic interactions with animal cells and human cells, these characteristic proteins are of great interest in biological and biomedical research. Research has shown ribosomal-inactivating proteins as antitumor, antioxidant, antibiotic, antiviral, anti-inflammatory agents, and effective remedies against many other biological issues. This paper outlines their mechanism of action and major pharmacological roles in biology research.</p> Graphical Abstract <p></p>