Myths and fears about genetic testing: what the evidence says
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Most myths and fears about genetic testing come from confusing clinical tests with consumer DNA kits, or from assuming that results will be frightening, confusing or unsafe. In reality, a clinical genetic test looks for specific variants linked to health conditions, most findings point to risks that can be reduced, and results are explained by trained professionals. Genotype Health uses a simple cheek swab, also known as a buccal swab, and each concern below has an evidence-based answer. For a full introduction, see everything you need to know about genetic testing and counselling.
Key takeaways
- Clinical genetic tests assess health risk. They cannot measure intelligence, talent or lifespan.
- Around half of people found to have a cancer-related variant in an Australian study had no close family history.
- Consumer DNA kits use different technology and can produce false positives, so they are not a substitute for clinical testing.
- Research shows that receiving genomic results does not cause lasting anxiety for most people, especially with genetic counselling.
What are the most common myths and fears about genetic testing?
The myths and fears about genetic testing fall into three groups: what a test can reveal, who it is for, and what happens afterwards.
Can a genetic test reveal intelligence, talent, ideal diet or lifespan?
No. Traits such as intelligence, athletic ability and lifespan are shaped by many genes together with environment and lifestyle, so they cannot be read from a DNA sample. The same applies to claims about the best diet, type of exercise or career for a particular person. Australia’s National Health and Medical Research Council notes that only a small minority of consumer genetic tests have established clinical value,1 and an international consensus found no place for such tests in predicting sporting talent.2 Clinical screens such as Omnagen look only for variants linked to health conditions.
Is genetic testing only for rare diseases or people who are already unwell?
It is not. In Australia’s DNA Screen study of 10,263 adults aged 18 to 40, about 1 in 50 carried a variant linked to hereditary cancer or high cholesterol, conditions that can be prevented or managed when found early.3 Proactive screens such as Prevonco, Cordagen and Omnagen are designed for healthy people. Read more about proactive health genetic screening.
Who benefits from genetic screening?
Many myths and fears about genetic testing assume that family history or routine checks tell the whole story.
If no one in the family has a genetic condition, is testing unnecessary?
Family history helps, although it misses many people. In DNA Screen, around half of those with a cancer-related variant had no close relative with a related cancer, and most would not have qualified for government-funded testing.3 Those with a strong family history can check the directory of genetic services across Australia. A chat with Tara, our AI assistant, is an easy way to explore more details on the proactive tests we offer.
Can a healthy person pass on a genetic condition?
Yes. Carriers are usually healthy and unaware of their status. In a national study of more than 9,000 Australian couples, about 1 in 50 had an increased chance of having a child with a serious genetic condition.4 This is what the Lineova carrier screen is designed to show.
Do blood tests and scans give the same information as a genetic screen?
They answer different questions. Blood tests and scans show how the body is now, whereas a genetic screen shows inherited risk years before changes appear. A normal scan today, for example, cannot show whether someone has an inherited chance of developing cancer later. Australian radiologists do not recommend whole-body MRI screening for people without symptoms, unless they have a previous cancer or a cancer predisposition syndrome.5 Knowing genetic risk therefore helps direct the right checks to the right people.
Are consumer DNA tests and AI as reliable as a clinical test?
Is a consumer test such as 23andMe just as good for less money?
Consumer tests cost less because most check only selected points in the DNA with a chip, a method a large UK study found extremely unreliable for very rare variants.6 In another study, 40% of variants reported in consumer raw data were false positives when rechecked in a clinical laboratory.7 Genotype Health’s screens use diagnostic-quality sequencing, which reads each gene on the panel in full instead of sampling a few points. See what makes a genetic test clinical-grade.
Is AI better than human experts at analysing genetic data?
AI is a useful tool, but not a replacement. International standards treat computer predictions as supporting evidence only, to be weighed by qualified scientists alongside clinical and family information.8 At Genotype Health, Tara provides general information, while results are analysed by laboratory scientists and explained by genetic counsellors.
What happens during and after the testing process?
The remaining myths and fears about genetic testing concern the process itself: privacy, bad news and complexity.
Will health and genetic data be sold?
In Australia, genetic information is classed as sensitive information under the Privacy Act, so stricter rules apply to how it is handled.9 Some overseas consumer companies do allow results to be sold,1 so the concern is understandable. Genotype Health does not sell health or genetic data, and nor do our laboratory partners. This is laid out in our privacy policy and in how we protect your genetic data.
What if the result shows a condition that cannot be changed?
Genotype Health’s proactive screens focus on medically actionable conditions, where earlier checks, lifestyle changes or treatment can lower risk. Research is reassuring too: a meta-analysis of seven studies found no clinically significant psychological harm from receiving genomic results.10
“Most people expect bad news and instead leave with a plan. A result is information that can be acted on, and nobody has to work through it alone.”
Dr Mona Saleh, Head Genetic Counsellor, Genotype Health
Are results too complex to understand?
They do not need to be. Genetic counselling is recommended before and after testing so people understand what a result means and what to do next.11 Anyone with questions can book a consultation with a genetic counsellor before ordering a test. Post-test genetic counselling is included in the cost of our tests for anyone with a positive result. Those with a negative result receive information on what it means, along with the option to book an appointment.
What else do people ask about genetic testing?
How is the sample collected for a genetic test?
Genotype Health uses a simple cheek swab, also known as a buccal swab. The kit is posted out, the swab is collected at home and it is then returned to the laboratory.
How long do genetic test results take?
Results are delivered securely online about four weeks from the time the lab receives your sample.
Do I need a doctor’s referral for a proactive genetic screen?
No. Genotype Health’s proactive and carrier screens can be ordered online, starting with a chat with Tara, our AI assistant. Targeted diagnostic tests are different and generally require a referral from a specialist.
Does a negative result mean there is no genetic risk?
No. A negative result means no relevant variant was found in the genes tested. It lowers the chance of an inherited risk but does not remove it, so family history and usual health checks still matter.
Can life insurers in Australia use genetic test results?
From 8 October 2026, life insurers in Australia cannot use adverse genetic test results to deny or limit cover. They can still consider symptoms and diagnosed conditions. Read our guide to genetic testing and your insurance.
Is genetic testing covered by Medicare?
Some people with symptoms or a strong family history are eligible for government-funded testing through public genetics services or Medicare. Genotype Health’s proactive screens and the Lineova carrier screen are not currently eligible for Medicare funding. See Medicare funding for genetic testing in Australia.
Does this test reveal my ancestry?
Some DNA sequences are more common in certain ethnic groups, but screens like this are not intended to check for ethnicity.
Related reading
- Everything you need to know about genetic testing and counselling
- What makes a genetic test clinical-grade?
- Genetic testing and your insurance
- What is genetic counselling? A plain-language guide
References
- National Health and Medical Research Council. Direct-to-consumer genetic testing: a statement from the National Health and Medical Research Council (NHMRC). NHMRC ref G9 [Internet]. Canberra: NHMRC; 2014 Dec [cited 2026 Oct 2]. Available from: https://www.nhmrc.gov.au/sites/default/files/documents/reports/statement-consumer-genetic-testing.pdf
- Webborn N, Williams A, McNamee M, Bouchard C, Pitsiladis Y, Ahmetov I, et al. Direct-to-consumer genetic testing for predicting sports performance and talent identification: consensus statement. Br J Sports Med. 2015;49(23):1486–91. doi:10.1136/bjsports-2015-095343
- Lacaze P, Tiller J, Brotchie A, Nguyen-Dumont T, Steen J, Belluoccio D, et al. Feasibility and outcomes of the DNA Screen nationwide adult genomic screening pilot. Nat Health. 2026;1(1):90–8. doi:10.1038/s44360-025-00020-x
- Kirk EP, Delatycki MB, Archibald AD, et al. Nationwide, couple-based genetic carrier screening. N Engl J Med. 2024;391(20):1877–89. doi:10.1056/NEJMoa2314768
- Royal Australian and New Zealand College of Radiologists. Whole body MRI screening in low-risk patients: position statement [Internet]. Sydney: RANZCR; 2025 [updated 2026 May 20; cited 2026 Oct 2]. Available from: https://www.ranzcr.com/document/2024-position-statement-on-whole-body-mri/
- Weedon MN, Jackson L, Harrison JW, Ruth KS, Tyrrell J, Hattersley AT, et al. Use of SNP chips to detect rare pathogenic variants: retrospective, population based diagnostic evaluation. BMJ. 2021;372:n214. doi:10.1136/bmj.n214
- Tandy-Connor S, Guiltinan J, Krempely K, LaDuca H, Reineke P, Gutierrez S, et al. False-positive results released by direct-to-consumer genetic tests highlight the importance of clinical confirmation testing for appropriate patient care. Genet Med. 2018;20(12):1515–21. doi:10.1038/gim.2018.38
- Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, et al. Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology. Genet Med. 2015;17(5):405–24. doi:10.1038/gim.2015.30
- Office of the Australian Information Commissioner. Guide to health privacy: introduction and key concepts. Version 2.0 [Internet]. Sydney: OAIC; 2025 May [cited 2026 Oct 2]. Available from: https://www.oaic.gov.au/privacy/guidance-and-advice/guide-to-health-privacy/introduction-and-key-concepts/
- Robinson JO, Wynn J, Biesecker B, Biesecker LG, Bernhardt B, Brothers KB, et al. Psychological outcomes related to exome and genome sequencing result disclosure: a meta-analysis of seven Clinical Sequencing Exploratory Research (CSER) Consortium studies. Genet Med. 2019;21(12):2781–90. doi:10.1038/s41436-019-0565-3
- healthdirect Australia. Genetic testing [Internet]. Canberra: healthdirect Australia; 2024 [reviewed 2024 Nov; cited 2026 Oct 2]. Available from: https://www.healthdirect.gov.au/genetic-testing
