Image 1 of 1 APOE $170.00 This is an add on blood biomarker test to the Essential Longevity Blood Biomarker Package.Genetic marker linked to Alzheimer’s disease risk and cognitive health. Add To Cart Added! This is an add on blood biomarker test to the Essential Longevity Blood Biomarker Package.Genetic marker linked to Alzheimer’s disease risk and cognitive health.