Foodborne illnesses caused by the presence of Gram-positive bacterial toxins pose significant health risks on a global scale. For timely intervention and prevention of outbreaks, rapid and accurate detection methods are indispensable. For the identification of bacterial toxins in food matrices, radioimmunoassay (RIA) has emerged as a sensitive and specific technique. A comprehensive discussion will be provided on the utilization of RIA for the identification of toxins generated by Gram-positive bacteria. Particular attention will be paid to crucial toxins such as staphylococcal enterotoxins (SEs) and Bacillus cereus toxins. By combining the specificity of antibodies with the sensitivity of radioisotope labeling, RIA can identify contaminants. RIA achieves a notable level of sensitivity in the identification of toxins even at low concentration by employing antibodies that have been imbued with specific toxin epitopes. An antibody generation process, assay condition optimization, and validation against standard methods are all integral components of the RIA development process for toxin detection. The efficacy of RIA in food safety analysis is augmented by its capability to quantify contaminants in intricate food matrices. It incorporates novel detection platforms and monoclonal antibodies, which increase the sensitivity and specificity of the assay, among other recent technological developments in RIA. Additionally, rapid and high-throughput screening of food samples is facilitated by the integration of RIA with automated sample processing systems, which streamlines analysis workflows. Due to the specialized apparatus and knowledge required, the implementation of RIA in routine food safety testing is restricted in scope. Further investigation is warranted to streamline assay protocols, decrease assay duration, and reduce expenses to facilitate the wider implementation of RIA in the detection of contaminated toxins. For the sensitive and specific detection of Gram-positive bacterial toxins in food, RIA is an invaluable instrument. Ongoing investigation and advancement in RIA technology hold the potential to bolster food safety measures and safeguard the general population from foodborne diseases induced by these pathogens.