The Tay-Sachs Disease Test is a blood test used to determine whether an individual is affected by or is a carrier of Tay-Sachs disease. Tay-Sachs is a rare inherited genetic disorder that prevents the body from properly breaking down certain fatty substances called gangliosides. When these substances accumulate in nerve cells, particularly in the brain and spinal cord, they cause progressive neurological damage. Tay-Sachs disease results from a deficiency of an enzyme called hexosaminidase A (Hex A). Without sufficient Hex A activity, toxic buildup occurs in the central nervous system. The most severe form begins in infancy and can lead to developmental regression, muscle weakness, and significant neurological impairment. This test measures the level of Hex A enzyme activity in the blood. Reduced or absent enzyme activity may indicate Tay-Sachs disease, while intermediate levels may suggest carrier status. Carriers typically do not show symptoms but can pass the condition to their children. This enzyme test can also help identify Sandhoff disease, a related condition in which the body cannot produce either Hex A or Hex B enzymes. Early detection and carrier identification are especially important for family planning and genetic counseling. What Is Included In This Test? This test includes: Measurement of hexosaminidase A (Hex A) enzyme activityDetermination of affected or carrier statusEnzyme analysis to support diagnosis of Tay-Sachs diseaseScreening for related enzyme deficiency such as Sandhoff diseaseClear laboratory results for clinical interpretation This is an enzyme activity test and does not directly analyze DNA. Why Does This Test Matter? Tay-Sachs disease is inherited in an autosomal recessive pattern, meaning a child must inherit a defective gene from both parents to be affected. If both parents are carriers, each pregnancy carries a 25% chance of having a child with the disease. Carrier screening is especially important in high-risk populations, including individuals of Ashkenazi Jewish descent, where carrier frequency is higher. Identifying carrier status allows couples to make informed reproductive decisions and consider genetic counseling. Early diagnosis in affected individuals allows families to access appropriate medical care, support services, and specialized monitoring. While there is currently no cure, early identification provides clarity and helps families plan for the future. Understanding enzyme activity levels empowers individuals with essential information about their genetic health and reproductive risk. Who Should Consider This Test? You may consider this test if you: Have a family history of Tay-Sachs diseaseAre of Ashkenazi Jewish descentAre planning a pregnancyHave a partner who is a known Tay-Sachs carrierAre seeking preconception genetic screeningHave had an abnormal newborn screening resultHave a child with developmental regressionWant carrier screening for inherited disordersAre undergoing fertility treatmentAre seeking genetic counseling Convenient, No-Appointment Testing To complete your test: Order online through our website Use the lab locator to find a nearby testing location Walk in; no appointment required Access your results securely in your HealthLabs.com account within one to three business days 110% Price Guarantee! If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.