Used in research settings to measure free testosterone levels in rat serum or plasma samples. This ELISA kit enables endocrine studies related to reproductive health, hormonal imbalances, and metabolic disorders in male and female rats. Commonly applied in preclinical trials, toxicology studies, and investigations into the effects of drugs or environmental factors on androgen activity. Provides a reliable, sensitive, and quantitative method for assessing bioavailable testosterone without the influence of binding proteins.