The human Estradiol (E2) ELISA kit is a powerful tool for quantitative measurement of estradiol levels in human serum and plasma samples, with a detection range of 50 pg/ml to 1200 pg/ml and a sensitivity of 40 pg/ml. The assay principle is competitive, meaning that two antibodies competitively bind to the estradiol in the sample. The detection is read at a wavelength of 450 nm. The assay time typically ranges from 1 to 5 hours, requiring a sample volume of 50-100 µl. The kit's performance has been validated in multiple studies found in more than 18 publications, ensuring its accuracy and reproducibility in measuring estradiol levels in human samples.