What longevity medicine actually does

Most people in the U.S. spend roughly the last decade of life living with at least one chronic disease. Longevity medicine is the attempt to shorten that decade. It does not promise to make anyone live to 120. It tries to keep you fit, clear-headed and independent for as many of your years as possible.

That changes the questions a physician asks. A standard check-up looks for disease that is already there. A longevity workup looks for the processes that lead to disease years before symptoms: arteries that are slowly filling with plaque, insulin resistance long before diabetes, muscle and fitness quietly declining in your forties.

Almost every serious program comes back to the same four causes of lost years.

Heart and blood vessels. Cardiovascular disease is still the leading cause of death in the U.S. Longevity practices look beyond total cholesterol to ApoB and lipoprotein(a), and often to imaging such as a coronary calcium score.

Metabolism. Insulin resistance drives heart disease, fatty liver and dementia risk. Fasting insulin, HbA1c, continuous glucose monitoring and body composition show it early.

Cancer. Here longevity medicine is about earlier detection: guideline screenings done on time, a careful look at family history, and sometimes imaging or blood-based tests whose benefit is still being studied.

Brain and body function. Cardiorespiratory fitness (VO2 max), muscle strength, balance and sleep are among the strongest predictors of how well and how long people live.

The tests are not the difference. Most of them can be ordered anywhere. The difference is what happens around them.

• A baseline you can compare against. The first workup matters less than the second and third. A good clinic repeats the same markers at sensible intervals.
• A physician who interprets, not just reports. Forty lab values without context are noise. You should leave with three to five priorities.
• A clear line between proven and experimental. Hormone therapy for a clear indication is not the same as an infusion with thin evidence. A serious clinic says which is which.
• Follow-through. Exercise, nutrition and sleep do most of the work. Clinics that help you change them deliver more than clinics that add more tests.

It is not a replacement for your primary care physician, and it is not a shortcut. No supplement, peptide or device outperforms regular exercise, a decent diet, sleep and not smoking. Be wary of clinics that lead with treatments before they have measured anything, or that promise to "reverse" your age.

Most longevity care is paid out of pocket. A solid initial workup with advanced labs and a physician review usually runs from several hundred to a few thousand dollars. Memberships with extensive imaging and year-round contact range from the low to the high four figures per year. Insurance and Medicare generally do not cover it, though HSA or FSA funds sometimes apply. Ask for a written cost estimate before you book.

Pick one clinic, one baseline and one plan you can keep up for a year. Then measure again. That is longevity medicine done properly — less spectacular than the marketing, and far more useful.