19/08/2026
More people than ever are receiving genetic risk scores, yet few are guided on what to actually do with the answer.
A 2016 study in the New England Journal of Medicine followed 51,425 people across three long-running cohorts. Among those at high genetic risk for coronary disease, individuals with a favourable lifestyle (not smoking, no obesity, active at least weekly, and a reasonable diet) showed a 46% lower relative risk of coronary events than those with an unfavourable lifestyle. In one cohort, that was the difference between roughly a 1 in 10 ten-year risk and roughly 1 in 20.
What that does not mean: that genetics stop mattering, that lifestyle guarantees anything, or that any individual should expect this exact number. These are observed group averages, not a personal forecast.
It is worth being precise about what did the work: four basic habits. Not the genetic test, and not a large diagnostic panel. Measurement does not replace any of that. What it can do: tell you whether what you are doing is working, and where you started from.
The finding has since been replicated in larger cohorts, including roughly 340,000 UK Biobank participants (Said et al., JAMA Cardiology 2018) and for overall lifespan (Bian et al., 2024).
Study: Khera et al., NEJM 2016 (PMID 27959714).
Purely educational content. Not medical advice. Diagnostic evaluations require individual medical indication by a licensed physician.
