AD-Detect is a screening test that uses plasma, the liquid component of blood, from a single blood draw to evaluate levels of amyloid beta proteins to help detect early signs associated with the risk of developing Alzheimer's disease. Amyloid beta proteins are known to accumulate and form plaques in the brain, which are linked to the progression of Alzheimer's disease. AD-Detect evaluates the ratio of two peptides of amyloid beta, Aβ42 and Aβ40, in plasma.