Know your biological age, then actually lower it.
A biological age number on its own is a party trick. The value is calculating it from a standard blood panel with PhenoAge, then moving the markers that drive it. Mallet does both, and tracks whether your number is going the right direction over time.
A number is a party trick. Lowering it is the point.
Plenty of apps will hand you a biological age. Most stop there. A single figure with no breakdown is something to screenshot, not something to act on, because it never tells you why the number is what it is or what to do next.
The useful version starts with a real method. PhenoAge, the algorithm developed by Morgan Levine at Yale from the NHANES dataset, turns nine markers on a standard blood panel into a biological age tied to actual health outcomes. From there it gets specific: which markers are dragging your number up, and which interventions move them. That is the difference between a fun stat and a plan you can run.
PhenoAge from your bloodwork
Upload a standard panel and Mallet runs the validated PhenoAge formula automatically, turning nine routine markers plus your age into a single biological age number.
The markers that move it
See exactly which of the nine markers are driving your result up or down, so a vague number becomes a short list of things you can actually change.
Your aging pace over time
Every new panel updates your trend, so you can see whether you are aging slower or faster than the calendar, the number that predicts where you are headed.
Connected to the habits that change it
Mallet ties your biological age gap to your training, nutrition, and supplement protocol, so you push the levers most likely to move the markers that matter.
Go deeper
Guides on calculating, reading, and lowering your biological age:
What is biological age?
Chronological age counts years since birth. Biological age measures how well your body is actually functioning, independent of the calendar. Two people who are both 45 can have biological ages of 38 and 57. The gap between the two numbers is what predicts disease risk, physical function, and longevity, and unlike your birthday, it is something you can change.
How is biological age calculated?
Mallet uses PhenoAge, a validated algorithm developed by researcher Morgan Levine at Yale from the NHANES dataset. It takes nine biomarkers from a standard blood panel (albumin, creatinine, glucose, CRP, lymphocyte percentage, MCV, RDW, alkaline phosphatase, and white blood cell count) plus your chronological age and outputs a single age number. Most of these markers already appear on a routine CMP and CBC, so you may already have the data.
How is this different from a DNA methylation test?
Methylation clocks like GrimAge or DunedinPACE read epigenetic marks and require a specialized, often expensive lab kit. PhenoAge is built from standard blood markers you can get at almost any lab, which makes it cheap, repeatable, and easy to retest every few months. Methylation tests can be powerful, but you cannot run one every quarter to watch a trend the way you can with a blood panel. For tracking change over time, blood-based is the practical tool.
Can I lower my biological age?
Yes, and that is the entire point of measuring it. A high PhenoAge is driven by specific markers (inflammation, glucose, immune signals), and those markers respond to interventions like Zone 2 cardio, adequate protein, omega-3s, and managing fasting glucose. Early clinical research suggests biological age markers can move in the right direction with diet and lifestyle changes, not just slow down. The number gives you a target; the markers behind it tell you where to push. None of this is medical advice, so build any protocol with a clinician.
How often should I recalculate it?
Every three to six months. A single PhenoAge tells you where you are. The more important number is your aging pace, which only appears once you have at least two data points and can see whether your markers are improving or drifting. The trend is the insight, so recalculate often enough to catch a change before it becomes a diagnosis.
Calculate it, then move it.
Join the waitlist for early access to the biological age app that calculates PhenoAge from your bloodwork and connects it to the habits that lower it.