Do you stress over antioxidants, striving as hard as you can to incorporate superfoods into your diet? Do you work out every day, refrain from smoking and drinking too much—maybe enjoy a glass of wine a day for its health benefits—and try to be as healthy as you can, hoping to live to be 100?

You still might not make it past 90, friend.

Of course, you still could—and more power to you for trying! By living a healthy lifestyle, you’re probably happier and healthier anyway, so even if you don’t live to be a decade, you’ll still enjoy the years you are here (not to say you won’t if you don’t do those things, of course).

Scientists have pinpointed a trait that people genetically carry that may indicate whether or not they will live to be 100 or older. Using 150 “genetic signposts,” they designed a way to predict whether or not someone born today will live to see 2110. Unfortunately for most of us, the trait that tells if you’ll be one of those ancient wise-people is quite rare; only 1 in 6,000 people carry it.

Most of the people with this rare genetic gem also remain disease-free until old age—9 out of 10 are generally still in great health by the time they reach age 90. So those of us who’ve had some nasty health issues know that our chances of carrying the gene are a lot less likely. Those of us who’ve taken biology and done those fun little Punnett squares are also aware that if we’ve had a “centennial”—or a person who’s reached the age of 100—in our family, our probability of having the gene also increases.

The accuracy of the study, however, is only 77% —which isn’t bad, but not completely definitive, either. So there may be other factors at play here. The researchers say that lifestyle choices, environment, and other variables could account for why some people live to be 100 or older, which makes perfect sense. After all, a person with the gene who still lives a crazy life, drinking absinthe and sleeping around with a different person without contraceptives every night probably has less of a chance of living to a ripe old age than a person who works hard at staying healthy. Who is happier? Well, you’d probably have to ask both people. Either way, I’m sure there are plenty of other reasons why people age well other than genetics.

Carry on with the superfoods, I say; it couldn’t hurt. Who couldn’t use a few more blueberries or broccoli florets in their diet, anyway?