Lately, my A1C Circle here in Boulder County has welcomed several people who were just told their A1C is creeping up. They didn’t wait for it to get worse. They showed up and started asking questions, looking for ways to get ahead of it. I want to applaud every one of them for showing up for themselves.

If that’s you, hold onto this. An elevated A1C does not mean you are doomed to slide straight into type 2 diabetes, the way some organizations make it sound. It also isn’t something to wave off. It’s an early signal, and you have quite a lot of room to respond.

I want to offer a gentler and more useful way to hold that number, because a recent conversation with metabolic researcher Dr. Paul Reynolds on The Metabolic Link podcast reframed it for me. Your A1C isn’t a grade or a verdict. It’s a window. And what it lets you see reaches far beyond blood sugar.

What the number is actually measuring

A1C measures how much of the hemoglobin in your red blood cells has been “sugar-coated” over the past few months. There’s a chemistry word for this, glycation, and it simply means that excess glucose in your bloodstream has bumped into a protein and stuck to it, changing it slightly in the process.

Dr. Reynolds uses an image I keep coming back to. Picture extra glucose as a sticky-fingered child running through the house, touching everything, leaving little marks on whatever it passes. A small amount of this is normal and unavoidable. We all carry some glycation, all the time. The question is one of degree and pace.

Here’s the part that surprised me most. Hemoglobin is just one protein among many, and it happens to be easy to measure with a simple, billable blood test. Most of your other tissues have no convenient test at all. So your A1C works as a proxy. When it climbs, it’s quietly telling you that the same sticky process is likely happening in places you can’t see.

Where else this shows up

Glycation tends to settle into the long-lived proteins of the body, the ones that don’t get replaced very often. That’s why its fingerprints turn up in so many places.

In the eyes, the proteins in the lens are prone to clouding over time, which is part of how cataracts form. In the skin, glycated collagen begins to stiffen and fragment, which shows up as thinning, sagging, and wrinkles. (This is part of why some people look noticeably older than their years.) In the bones, that same collagen turns brittle. Even our antibodies can get glycated, which means they still do their job, just not as well, so we tend to get sick a little more often and stay sick a little longer.

And then there’s the brain, which is especially vulnerable because it runs on so much glucose. Dr. Reynolds shared something that stayed with me: autopsy studies of people who died young, in their twenties and thirties, already show glycation building up in brain tissue. Alzheimer’s is diagnosed in our later years, but it appears to take shape across the decades before that. That sounds heavy at first. I find it strangely hopeful, because it means there is a long, long window in which our daily choices matter.

Why this is good news, not a reason to panic

If glucose abundance is what feeds this whole process, then the things that steady our glucose are also the things that slow glycation, calm inflammation, and protect the brain, the heart, and the skin all at once. One lever, many benefits.

None of these are about perfection, and none of them compete with each other. Dr. Reynolds was clear that they stack. You get to choose the ones that fit your life and build from there.

A few that are genuinely doable:

• Move, in whatever form you’ll actually repeat. Muscle is the body’s largest “sink” for excess glucose, and movement pulls sugar out of the blood even when insulin isn’t cooperating. A daily walk counts. The stairs count.
• Give your body a break from constant grazing. This isn’t extreme fasting. It can start as simply as dropping the snack between breakfast and lunch, so insulin has a few hours to settle. Those quiet gaps switch on your cellular cleanup crew.
• Steady the carbs you do eat. Whole foods over processed ones, and a lovely small rule from the episode: eat your fruit, don’t drink it.
• Sleep, and tend your stress. Seven hours or more supports the hormone balance that keeps the whole system steady.
• Favor consistency over intensity. Small changes compound. A pilot who shifts course by half a degree lands hundreds of miles from where they started.

A softer way to read your lab report

The next time you see your A1C, I’d love for you to read it less like a judgment and more like a dashboard light. It’s information, offered early, while there’s still so much you can do.

None of this is meant to be carried alone, or in fear. That’s the heart of my Wellness Consultation, a 90-minute one-on-one conversation where we make sense of your A1C together and put any lifestyle changes in the right perspective for your life.

If worry about your number has been taking up more room in your mind and heart than you’d like, I’d love to hear from you. We’ll sort through it together.

This reflection draws on a conversation with Dr. Paul Reynolds on The Metabolic Link podcast. It’s meant for education and encouragement, and it works best alongside the care of your own medical team, never in place of it.