Articles on Direct-to-consumer DNA testing

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A telomere age test kit from Telomere Diagnostics Inc. and saliva. collection kit from 23andMe. Anna Hoychuk/Shutterstock.com

DNA testing companies offer telomere testing – but what does it tell you about aging and disease risk?

Genetic testing companies are offering tests that analyze the ends of your chromosomes – telomeres – to gauge your health and your real age. But is there scientific evidence to support such tests?
Polygenic risk scores currently account for only a small proportion of your total genetic risk. Shutterstock

Genetic risk tests are now widely available, but they aren’t always useful – and could even be harmful

Most common chronic diseases are the outcome of complex interactions between genetic, environmental and social risk factors, so a genetic risk score, on its own, isn't much help.
We’ve underestimated the extent of mixing between ancestral groups throughout human history. from www.shutterstock.com

How DNA ancestry testing can change our ideas of who we are

Estimating our ancestry is hard – because our backgrounds are much more mixed up than we thought. So don't take your DNA ancestry test results literally: they're just a prediction.
Genetic ancestry testing might all seem like harmless fun, but there is a downside. (Shutterstock)

Genetic ancestry tests don’t change your identity, but you might

The results of genetic ancestry tests are grossly over-simplified. A new study shows the tests reinforce what you want to believe rather than offering objective, scientific proof of who you are.

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