The DHEA-Sulphate (DHEAS) test measures the level of a key hormone produced by your adrenal glands. DHEAS is a precursor to hormones like testosterone and estrogen. This test is essential for evaluating your adrenal gland function. It is a critical tool for investigating symptoms of hormone imbalance, such as excess facial hair (hirsutism) in women, and is a key part of a workup for PCOS or adrenal disorders. A simple blood draw is required. This test provides vital, specific information to help uncover the root hormonal cause of your symptoms.