“It’s not the years, honey. It’s the mileage.”
Raiders of the Lost Ark
Two people turn fifty on the same day and share almost nothing else in common. One has a decade of untreated high blood pressure, 20 years of smoking, and a family history nobody has ever asked about. The other paid a little attention to his bloodwork, cleaned up his diet, maintains a stable weight, and has a colonoscopy already on file.
Physicians call the distance between them biological age: a measure of accumulated wear that the calendar doesn’t capture. It appears in inflammatory markers, in how efficiently cells repair damage, and increasingly, in cancer outcomes.
Cancer follows the same logic: the earlier a diagnosis relative to when it actually started shapes the outcome more than almost anything else.
THE BIG IDEA
Cancer survival just reached a milestone: 70 percent of people diagnosed between 2015 and 2021 were alive five years later, according to the American Cancer Society’s 2026 report. There wasn’t a miracle drug that pushed the survival rate. It increased because more cancers are being caught while they’re still small.
Colorectal cancer cases in adults under fifty have risen by roughly a third since 1990, part of a broader rise across more than a dozen cancer types in younger adults. It is part of why colonoscopy guidelines now start at forty-five instead of fifty. Two reasonable-sounding beliefs get in the way of acting earlier.
“I’d know if something were wrong.” Usually not. Many cancers grow for years without symptoms, and the first sign is often the one a person hoped to avoid.
“Cancer is mostly bad luck.” Genetics matter, but close to 40 percent of cases trace back to modifiable risk: diet, weight, alcohol, inactivity, tobacco.
Both beliefs share the same flaw: they treat cancer as something that either strikes or doesn’t, rather than something with a measurable head start.
Three Ideas Oncology Agrees On
01
Stage decides almost everything.
A cancer found early and one found late are nearly different diseases in terms of outcome.
02
Screening only works on schedule.
A single good scan years ago does not protect you the year you skip the next one.
03
Close to half of risk is in your hands.
Weight, alcohol, movement, and tobacco use shift the odds more than most people assume.
Oncology research most consistent findings.
What the Data Actually Shows
Cancer follows the same logic: the earlier a diagnosis relative to when it actually started shapes the outcome more than almost anything else.
70%
5-year survival, all cancers.
The highest rate on record, for cancers diagnosed 2015 to 2021. (ACS, 2026.)
4.8M
Deaths averted since 1991.
Driven mostly by less smoking, earlier detection, and better care. (ACS, 2026.)
Survival still depends heavily on how early a cancer is caught.
Only about 28 percent of lung cancers, and just 17 percent of pancreatic cancers, are currently caught early enough to fall into that better category. (American Cancer Society, Cancer Statistics 2026.)
Risk. Excess body weight alone accounts for about 7.6 percent of new U.S. cancer cases, one slice of a modifiable-risk picture that also includes alcohol, inactivity, and tobacco. (American Cancer Society.)
Screening. Guideline screening just got a meaningful update. In May 2026, the ACS added newer at-home stool tests, including an updated Cologuard, as a recommended option alongside colonoscopy for colorectal cancer, done every three years for those who qualify, with any positive result still requiring a follow-up colonoscopy.
New signal. A newer blood test, Galleri, complements guideline screening rather than replacing it. In GRAIL’s PATHFINDER 2 study (ASCO, 2026), it was evaluated in nearly 36,000 symptom-free adults 50 and older, flagged a signal in under 1 percent, correctly located that signal’s origin 92 percent of the time, and caught about 71 percent of new cancers at stages I through III, when treatment aimed at cure is more often possible.
A brief, manageable step now, standing in for a much harder one later.
The Screening Baseline
The first group reflects current U.S. Preventive Services Task Force and American Cancer Society guidelines. Colonoscopy remains the gold-standard, most sensitive option for colorectal cancer; newer stool tests are a guideline-recommended alternative for those who qualify, not a substitute for colonoscopy if a result comes back positive. The second group is additional signal some longevity-focused members choose to add, worth a conversation with a physician, not a guideline standard on its own.
Guideline-Recommended
Colonoscopy
The Gold Standard
Removes precancerous polyps during the exam itself. Starts at 45, earlier with family history. Still the most sensitive option available.
Cologuard
A Guideline Alternative
ACS’s May 2026 update added newer stool DNA tests, every three years, for average-risk adults. A positive result still requires a follow-up colonoscopy.
Low-Dose CT
Lung, While Localized
For current or former heavy smokers, roughly 50 to 80. The guideline path to catching lung cancer early.
Mammography
Standard, Plus Added Imaging
The guideline screening for breast cancer. Strong family history may add breast MRI to the plan.
PSA
Baseline And Trend
Not one-size-fits-all. Works best as a number tracked over time, not a single pass-fail read.
Additional Signal, By Discussion
Galleri
The Added Layer
A multi-cancer blood test added alongside, not instead of, standard screening.
Whole-Body MRI
Not Yet A Guideline Standard
Popular in longevity circles, but not yet recommended for people without symptoms or known risk. A conversation, not a default.
Seven checkpoints, two tiers: what guidelines already require, and what a longevity-focused plan sometimes adds.
The Practice
What It Actually Takes
What actually reduces cancer risk includes a small number of habits, done on a consistent schedule regardless of how busy the year gets.
Put it on the calendar, not the to-do list. Screening only protects you if it happens on schedule. Book the next colonoscopy, mammogram, or low-dose CT before you leave this year’s appointment, not after you remember you’re due.
Build cardiorespiratory fitness, not just a screening record. People in the high-fitness group have roughly 45 percent lower cancer mortality than people in the low-fitness group. (Schmid & Leitzmann, Annals of Oncology, 2015.) A few hours a week of sustained Zone 2 cardio, kept up for years, is the direct path there.
Say the family history out loud. Most members have never had a physician formally review their family cancer history against current screening guidelines. A fifteen-minute conversation can move your starting age for a given screening by a decade or more.
The standard isn’t eliminating risk. It’s knowing where you stand, and keeping a plan that works while you’re busy living.
The Bigger Picture
The Long View
Zoom out and this fits a pattern Sperity Health applies across cancer, cardiovascular disease, and cognitive decline alike: know your numbers, catch problems early, adjust what is actually within your control. For cancer, a colonoscopy kept on schedule, a lower average alcohol intake, a stable weight, a family history someone has actually reviewed and some advanced preventative tests don’t guarantee an outcome, but together they meaningfully shift the odds toward catching something early enough that stage, not luck, decides what happens next. You can’t do anything about the years. You can do quite a bit about the mileage.
This isn’t about worrying more. It’s about making sure something is actually watching, on a schedule, whether you’re thinking about it or not.
From the Physician Team
A Note from Your Sperity Health MD
“Cancer screening carries a strange kind of anxiety, because the appointment itself can feel like the scary part. In practice, the opposite is usually true. Most screenings come back normal, and the ones that don’t are far more manageable when caught early than most people expect. I would rather sit with a patient through five minutes of nerves before a colonoscopy than have that same conversation five years later, at a later stage. The data backs that up consistently, and it’s why we build screening into the plan the same way we build in labs and vitals, not as an afterthought.”
This is general education, not medical advice. Talk with your physician about what’s right for you.
Additional Reading
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