Genetic Markers Not Very Good for Predicting Disease Risk

January 8, 2020

(Reuters) – Many people worry about inheriting health problems from their parents, but a new approach to analyzing genetic contributions to disease risk suggests that for most diseases, commercial DNA tests are not the best way to assess the odds. For the study, researchers analyzed data from almost 600 earlier studies that found associations between common variations in the DNA sequence, known as single-nucleotide polymorphisms (SNPs), and more than 200 medical conditions. Usually, genetics explained no more than 5%-10% of the risk for several common ailments including certain cancers, diabetes and Alzheimer’s.