Angiotensin III, human, mouse, is primarily used in research settings to study its role in the regulation of blood pressure and fluid balance. It is a peptide hormone that acts on the central nervous system and peripheral tissues, influencing vasoconstriction and aldosterone secretion. Researchers utilize it to investigate its effects on cardiovascular diseases, such as hypertension and heart failure, as well as its potential interactions with angiotensin receptors. Additionally, it serves as a tool to explore the renin-angiotensin system's mechanisms and its implications in kidney function and sodium retention. Its application is critical in developing therapeutic strategies targeting angiotensin pathways.