I paid for a test that told me I was older than I am

I paid for a test that told me I was older than I am.

Not metaphorically. A biological age test, the kind that reads your cells and estimates how worn they actually are, regardless of the date on your passport. I was forty-seven. The number that came back was forty-nine.

Two years. It doesn't sound like much. But I had spent my whole life being the guy who was ahead of where he should be, and here was a machine telling me, coldly, that for the first time I was behind. Behind my own age.

I want to start here, with that small humiliation, because most of what you'll read about longevity starts from the opposite place. It starts from someone showing you their perfect markers, their flawless routine, their reversed age. I'm not that person. I'm running an experiment on myself, and I'm going to show you the real results, the wins, and the parts that don't work.

An experiment, not an example.

So let me tell you how I got here, because I suspect it's your story too, a few years apart.

For most of my life I never thought about my body. It just worked. I'm a film and TV composer; I've spent fifteen-hour days in front of screens for thirty years without a second thought. Then, somewhere around forty-five, the small signals started. Waking up with a back that hurt for no reason. Eyes that suddenly needed glasses to do the work they'd always done for free. A creeping difficulty in sitting and concentrating the way I used to. Nothing dramatic. Just a body that had quietly started sending invoices.

It wasn't the first warning. Years earlier, my lungs had collapsed, a double pneumothorax. I went from fine to the emergency room in the space of a minute; I didn't wait. I still remember three doctors leaning over me at once, and the exact moment I understood my life was actually on the line. I survived. And I listened, a little. I changed a few things, for a while. Not enough. Because that, I think, is how the body works: it sends the same message twice. Once as an alarm you cannot possibly ignore, and then, years later, as a slow bill you almost don't notice until it has quietly added up.

Here's the part that made it interesting. I didn't come to biology as a beginner. Long before the music, I trained as a geneticist, a master's degree I'd set aside for three decades to go write for orchestras. So when my body started misbehaving, I didn't just google symptoms. I went back to the science I'd abandoned, and I found that something had changed while I wasn't looking. The field had moved. There was suddenly real data, real tools, real interventions where there used to be only folklore and supplements.

And then the strange thing happened, the thing this whole newsletter is built on.

I couldn't read the science the way a doctor reads it. I'm a composer. I kept hearing it. Where the papers said "decline," I heard an instrument slipping out of tune. Where they described aging cells losing their ability to talk to each other, I heard an orchestra where the musicians had stopped listening, each one drifting at its own tempo until the music turned to noise. Where everyone else was trying to optimize the body, like a machine where you turn every dial to maximum, I kept thinking: that's not how you fix an instrument. You don't make a violin louder. You tune it. You get the strings back in relationship with each other.

That intuition, aging as de-tuning, longevity as re-tuning, coherence over maximization, is the thread I'm going to pull, in public, for as long as it takes. I don't have it all figured out. I have a genetics background, a Stanford AI & Longevity Lab program behind me, a body that's actively misbehaving, and an ear trained by thirty years of listening for when something is in or out of harmony. I'm going to cross those worlds and see what falls out.

Why follow me instead of the people with the perfect numbers? Honestly, because I'm maybe three to five years ahead of you on this exact road, and I'm walking it out loud. I'll measure, I'll test, I'll get things wrong, and I'll tell you. You get the map of the path while I'm still clearing it.

Next time, I'll start where it gets concrete: the single idea that reorganized everything for me, that in biology, as in music, the pattern matters more than the level. Why a steady, "optimal" amount of almost anything is often the wrong target, and why your body is built to run on rhythms, not plateaus.

I re-measure soon. I'll show you the number, whatever it says.

Update, September 2026. I re-measured. Same test, same clock. At 53, my biological age is 40. The number, whatever it said, was the promise: here it is. The full curve is on the method page.

— Alexandre