If your mother or father made it to 100, I have encouraging news for you. A new study suggests longevity runs in families in ways that show up in your own health, not just in the family photo album.

Researchers found that people whose parents reached age 100 tend to be healthier themselves, with lower risks of heart disease, high blood pressure, and early death compared with people whose parents didn't live that long. A head start, not a free pass. You can read the full report over at US News.

Let me explain what's going on here, because the genetics of aging get oversimplified constantly. Longevity isn't one gene you inherit like eye color. It's more like a hand of cards, dozens of variations scattered across your genome, that together influence cholesterol handling, inflammation, insulin sensitivity, and how well your cells repair themselves. Children of centenarians tend to hold a slightly better hand. They also often inherit habits, the cooking style, the daily walk, the outlook on life, and those matter more than people assume.

My years in nursing taught me that families like this usually have more going for them than DNA.

Earlier research in this area, going back many years, has found that children of centenarians don't just live longer, they stay healthier longer. In those studies, the diseases that sideline most people in their seventies and eighties tended to arrive later, and sometimes not at all. Scientists call this compression of morbidity. Plainly put, fewer sick years at the end of life rather than more years of illness. To be clear, that concept comes from the earlier body of work, not from the new study, which looked specifically at heart disease, blood pressure, and mortality.

Now I want to gently push back on the tempting conclusion. Some people will read this study and think, well, Grandma lived to 102, so I'm covered. That's not how this works. Genes account for only part of the picture; most researchers in this field consider the heritable share of lifespan to be real but modest. The rest is lifestyle, environment, luck, and the healthcare choices you make along the way. I've seen patients with stellar family histories land in cardiac units, and I've seen people with terrible family histories thrive into their nineties because they took the boring stuff seriously.

So what do you do with this information?

First, know your family history and share it with your doctor. If centenarians run in your family, that's useful context for how your clinician weighs your risks. Second, treat longevity genes as a bonus, not a plan. The evidence here has been remarkably consistent for decades: not smoking, keeping blood pressure in check, staying physically active, and maintaining strong social connections do most of the heavy lifting. We covered a large study recently showing how much avoiding smoking, hypertension, and diabetes in middle age lowers dementia risk, and this fits the same pattern.

My son Linton went through a rough stretch with his health in his twenties, no family history could protect him from that, and what turned things around was the daily unglamorous work. That shaped how I think about all of this. Your genes deal the cards, and you still have to play them.

If your parents are still with you and doing well in their later years, call them this weekend. Ask questions about your grandparents while you're at it. That family knowledge is a real part of your health record, and most of us never bother to collect it.

**Audit:** The original was mostly clean already. Remaining tells I fixed: the "A few things." staccato fragment after a question (folded), "not a free pass" tailing punchline (kept but restructured as its own clause with a comma splice, which fits Jane's imperfect-warmth style), and "Genes load the dice, but you still throw them" aphorism formula (rephrased as a plainer image). Facts, links, and paragraph count unchanged.