A new survey of 1,068 people who have taken DNA tests shows that the results are leaving a lot of people surprised.

Let’s start with what people find out about their ancestors, which is arguably the “fun” part of DNA tests (at least until you tell your parents they’re not actually from the country they claimed their whole lives). A full 78 percent of people learning their lineage got at least some new results they weren’t expecting; 7 percent got totally new info on their background. Among all that, 40 percent claimed the results directly contradicted what they’d been told by family.

The heartwarming bit: One in four people reached out to estranged family once they got their DNA-proved pedigree. Awww.

Reactions to the health results are a little more interesting. After all, it’s one thing to be informed by science that “Surprise, you’re Irish!” and another to hear “Surprise, your DNA is filled with genetic markers that indicate maybe you shouldn’t have children.” While most people take a genetic health test out of simple curiosity (60 percent), about half are looking for any genetic risks for disease, and 31 percent are looking to confirm whether they have a disease that runs in the family.

The results are mixed: 42 percent of people get relief from their health results, but 30 percent were concerned. In fact, one in three got totally unexpected health results—but thankfully, only 7 percent reported the results were worse than they expected. 38 percent said the results were better.

At the top of this story, you can see that the results of the health DNA tests lead to a lot of good changes in lifestyle—46 percent of people made a change once the results were in. 10 percent even claimed they quit their high-stress jobs based on DNA health results. You can thank a robust economy for that, too.

Ultimately, can the DNA tests be trusted? The customers taking them think so—the overwhelming majority of people surveyed trust their ancestry results (79 percent) and their health results (75 percent). There is merely a sliver of unconfident customers (5 percent on ancestry and 7 percent on health). Around 87 percent would recommend others do the cheek swab and mail it in.

The survey was run by YourDNA, company that tries to bring together companies in the DNA testing space as a community and platform. You can read the full DNA Discovers results here. And here’s some information about the privacy of your DNA data.