Used to quantitatively measure human β-defensin 1 levels in biological samples such as serum, plasma, saliva, and cell culture supernatants. This ELISA kit is widely applied in immunology and inflammation research to study innate immune responses, as β-defensin 1 plays a key role in antimicrobial defense and immune modulation. It is also used in clinical studies investigating diseases like chronic obstructive pulmonary disease (COPD), psoriasis, urinary tract infections, and certain cancers, where altered β-defensin 1 expression has been observed. The assay helps researchers evaluate host defense mechanisms and assess potential biomarkers for disease progression or therapeutic response.