Where people live, how they grow up and who they are genetically all have a hand in shaping health outcomes – though genetics may have an edge as a health influencer, according to a massive new study of twins in the U.S.

The findings, published this week in Nature Genetics, indicate that the nature-versus-nurture debate yields no simple answer: While both genetic and environmental factors can play a significant role in determining whether someone has a disease, how much weight each holds depends on the type of health condition.

Read more at US News.