My Eight-Year-Old Asked Me to Race Him to the Car. I Pretended I Didn't Hear. That Was the Day I Stopped Pretending I Was Fine.

I want to tell you about the moment I knew something was actually wrong — not the slow decline that I could explain away, but the specific evening when the explanation ran out. But first: if you found this because you are training the same way you always have and recovering twice as slowly, and nothing you have adjusted — sleep, nutrition, volume, supplements — has reversed the trend, I already know where you are. I was there for two years. The gap between effort and result kept widening and every credible explanation I tried was wrong. What follows is what I eventually found — and it started with my daughter saying something I could not unhear.

My daughter is seventeen. She is not a person who says things for effect.

One evening she turned to me and said: "Dad, you seem really tired lately. Is everything okay?" I told her I was fine. I smiled the smile you use when you want someone to stop looking at you.

She nodded and went back to her phone.

I wasn't fine. I hadn't been fine in about two years. The fact that she could see it — that my seventeen-year-old could read the decline on me — was the moment I stopped pretending it wasn't happening. I had run out of convincing even myself.

The slide had started at around 44. I put it down to work first. Sales Director role, long hours, a lot of travel, the kind of pressure that has always eaten into everything else. I had always recovered from the pressure before. I stopped recovering. Then I put it down to turning 45. Then 46. Then I stopped putting it down to anything because I had run out of credible explanations.

The pattern was always the same. Friday evening I'd make plans with the kids for the weekend. Football, cycling, something. By Saturday morning I'd wake up in the same bone-deep exhaustion I had carried for months, eat breakfast, and spend the day watching from the sideline instead of being in it. By 8pm I was asleep on the sofa. I missed bedtimes. I missed conversations. I was physically present and functionally somewhere else, running a thin version of myself while the real version waited for something to change.

I had been a serious cyclist in my thirties. Century rides, sportives, proper events. At 46 I was struggling to get through a 30-minute indoor trainer session without needing to stop. My recovery from any exercise had extended from the expected 24 hours to 48, sometimes 72. I ran a max power test one afternoon because the denial had become unsustainable. My output was 40% lower than it had been four years earlier. Not deconditioning. Something deeper.

There is a tiredness that feels right. And there is the other kind.

The tiredness had a specific character I want to describe correctly, because it matters.

There is a tiredness that feels right. You've done something hard — a good long ride, a heavy week, a day that produced something real — and you're tired in a way that makes sense. That tiredness feels like payment. You know it will clear. You feel like yourself, just emptied temporarily.

What I was carrying was the other kind. The kind that doesn't feel like payment for anything. The kind that's there before you've done anything to earn it — already present when the alarm goes off, carrying through the day regardless of what you eat or how long you slept. You're not recovering from something. You're permanently below baseline and the gap is not closing.

Those are not the same kind of tired. I didn't have language for the difference until later. Satisfied tired and broken tired. I had been broken tired for two years without naming it.

I tried everything systematic people try.

I cut alcohol completely for two months. I felt better for about three weeks and then returned to where I had been before. I rebuilt my sleep discipline — earlier bedtime, no screens, cooler room, the full protocol. Same result. I had a private blood panel done that returned everything as normal. My GP reviewed those results and told me my levels were "appropriate for my age." I wanted to ask him what part of this was appropriate for my age.

I bought NMN capsules after listening to a podcast where someone credible laid out in real detail why NAD+ decline after 40 was responsible for exactly the fatigue pattern I was describing. I was not a supplement person. I read the research before buying. I sourced pharmaceutical-grade product. I took it for three months and felt nothing. I increased the dose. I changed the timing. I added resveratrol because the same podcast suggested it might help the protocol work. The line didn't move.

A cycling training partner of mine — 51 years old, a decade closer to retirement than to his athletic peak — was posting times I could no longer match. Even in the state I was in, that should not have been the case. He mentioned NAD+ injection. Not capsules. A different format entirely.

I looked into it properly. Not a quick search. A weekend of actually reading — the delivery science, the bioavailability comparison between formats, the reason format matters when the molecule matters. And I understood something I had not understood before.

The reason the capsules hadn't worked was not that NAD+ doesn't work.

The reason the capsules hadn't worked was not that NAD+ doesn't work. The reason is that the capsule cannot deliver it effectively.

Oral NMN is a precursor. The body has to convert it into NAD+ through a multi-step enzymatic process. Each step involves losses. Each step depends on gut function and enzyme availability, both of which decline with age. What arrives at the cellular level after swallowing a capsule is substantially less than the label dose — and that fraction gets smaller every year past forty. You are putting the right raw material into a conversion system that is increasingly unable to process it.

Subcutaneous injection delivers the finished molecule directly. No gut degradation. No conversion chain. It enters systemic circulation as NAD+ because it never had to become anything else. The bioavailability difference is not marginal. It is structural.

This is what my training partner had figured out before I did.

I started the NADPure protocol six weeks ago.

NADPure is a subcutaneous injection pen for at-home use. Each pen ships as high-purity NAD+ powder in a pre-measured 500mg dose — batch-verified, independently laboratory tested. Before use, you add sterile solution and mix for about 30 seconds, then load the pen. The injection itself is fine-gauge subcutaneous, administered to abdominal tissue. Most users describe a mild, brief sensation. Total time: under 90 seconds. I do it before breakfast. Ships with a silicone cool-pack. No refrigeration required.

The change I noticed first — at about three weeks — was recovery. Not the speed of it. The quality.

I had forgotten what earned tiredness actually felt like. After a hard Saturday ride, I woke Sunday not depleted. Normally rested. Ready to do something with the day rather than recover through it. By week four the 3pm wall that had been ending my usefulness to my family every afternoon for two years had become inconsistent. Then absent. One day I noticed it was 4:30 and I hadn't hit it. Then 5. Then I realised I had been home from the school run for an hour and I had been properly present the whole time — making dinner, having an actual conversation, in the room rather than performing being in the room while running on fumes.

Six weeks in, on a Saturday afternoon, we played football in the garden. My son, my daughter, me. I played. Properly. Running, engaging, not managing myself carefully from a position that minimised effort. I was in it.

My son stopped at one point and looked at me.

Like it was surprising. Because it had been that long since it hadn't been.

I do not want to manage my decline. That sentence came out of nowhere a few months ago when I was trying to explain to myself what I wanted. I want to reverse it. I had given up on the version of me that existed at 38 being available to the version of me at 46. I was wrong.