What is Promethease?[edit] Promethease is a literature retrieval system that creates a personal DNA report based on your DNA data, taking into account all the scientific and medical literature cited in SNPedia. Customers of DNA testing services (Ancestry.com, 23andMe, FamilyTreeDNA, Genos, Complete Genomics, WeGene, ...) use Promethease to learn more about their DNA variants, independent of whiche