When you send a saliva sample to a DNA testing company, you’re handing over something deeply personal — data that can never be changed and that reveals information about your entire family. Surveys show that roughly 77% of people have at least some level of concern about this.
Here’s what the research says about how worried people really are, what they’re worried about, and how privacy fears are shaping the DNA testing market.
How Concerned Are People About DNA Privacy?
The short answer: very. Half of all respondents in national surveys are seriously worried about what happens to their genetic data after they hit “submit.”
- 50% are deeply concerned that for-profit DNA testing companies will share their genetic information without consent.
- 36% worry about medical researchers sharing their data without permission, and 32% feel the same about medical doctors.
- 87% want legal protection: The vast majority believe it should be illegal for insurers and employers to access DTC genetic information.
- 74% want stricter regulation on how companies use and share your genetic data.
Who’s Most Concerned?
Your age, background, and political views all shape how you feel about DNA privacy. The differences are notable.
- Age matters: 56% of adults 50 and older are OK with DNA companies sharing data with law enforcement, compared to just 42% of people under 50.
- Race and ethnicity: Nonwhite Americans are far more likely to report being surprised by their DNA results, which may reflect both unexpected revelations and deeper concerns about how that data gets used.
- Political affiliation: Republicans and Republican-leaning independents are slightly more likely to accept law enforcement data sharing than Democrats (52% vs. 47%).
- Socioeconomic factors: People who are not White and/or Hispanic report higher interest in genetic testing overall. However, people with lower socioeconomic status show less interest, which may partly reflect privacy concerns alongside cost barriers.
What Specifically Worries People
Your concerns probably fall into one of four main categories. Each one has real-world examples that show why the worry is justified.
| Concern | What It Means for You |
|---|---|
| Data Security and Hacking | Your genetic data is permanent — unlike a password, you can’t change it if it’s stolen. In 2018, MyHeritage reported a data breach affecting user email addresses and hashed passwords. |
| Law Enforcement Access | Police have used DNA from genealogy databases to solve crimes, as in the Golden State Killer case. You may not have consented to that use when you signed up. |
| Secondary Use of Data | Companies may use your data for purposes beyond what you originally agreed to. 23andMe, for instance, sold the rights to a drug developed using aggregated customer data. No individual was identifiable, but the precedent concerns many people. |
| Impact on Family Members | When you take a DNA test, you’re also revealing genetic information about your parents, siblings, and children — people who never agreed to be tested. |
How Privacy Fears Affect the Market
Despite widespread concern, the relationship between worry and behavior is complicated. Many people take DNA tests anyway.
- Split opinion on law enforcement: About 48% of Americans say it’s acceptable for DNA companies to share data with police to solve crimes. A third say it’s unacceptable, and 18% aren’t sure.
- Testers are slightly more comfortable: Among people who’ve already used a mail-in DNA test, 51% are OK with law enforcement access, compared to 48% of non-users.
- Privacy policies are hard to read: Most DTC genetic testing companies write their privacy statements at a college reading level. They tend to be long, vague, and difficult to understand.
- Policies don’t meet guidelines: A review found that most DTC companies’ privacy statements fail to comply with international transparency guidelines for confidentiality and data use.
- The market keeps growing: Despite all of this, the global DTC genetic testing market was projected to reach $2.5 billion by 2024. People are concerned, but they’re still buying.
What You Should Know Before Testing
Privacy protections for your genetic data are still limited. There aren’t many federal laws specifically addressing DNA privacy, and advocates are pushing for clearer regulations.
One reason to stay cautious: a study in Nature Communications showed that researchers could correctly identify between 40% and 60% of participants in supposedly anonymized genetic studies. “Anonymous” doesn’t always mean what you think it does.
If you’re considering a DNA test, we recommend reading the company’s privacy policy carefully, understanding what happens to your data after testing, and checking whether you can request deletion of your sample and data. Your DNA is uniquely yours — and once it’s out there, you can’t take it back.
