Used in biological research to quantify spermidine levels in rat samples, this ELISA kit enables scientists to study polyamine metabolism in physiological and pathological conditions. It is particularly useful in aging, neurodegeneration, and cancer studies where spermidine plays a regulatory role in cell growth, autophagy, and oxidative stress. The kit supports high-throughput analysis with high sensitivity and specificity, making it ideal for preclinical studies investigating dietary, pharmacological, or genetic interventions that affect spermidine concentrations in tissues or biofluids.