Your Lab Results Say "Normal." Your Body Is Telling a Different Story.

By Trip Goolsby, MD | Infinite Health Integrative Medicine Center

Lab vials

Every week, patients walk into my office carrying a stack of lab results and a lot of frustration.

Their primary care doctor told them everything looks fine. But they're exhausted. Their body composition is shifting despite doing "all the right things." Their drive — mental and physical — isn't what it used to be. And somewhere in the back of their mind, they know something is off.

They're right. And their labs prove it — if you know what to look for.

Here's the problem with standard lab work: the reference ranges printed on your results aren't based on what healthy looks like. They're based on population averages — averages that include a lot of chronically ill, sedentary, metabolically compromised people. When your results fall inside that range, you're being told you're no worse than average. That's a low bar.

At Infinite Health, we don't compare you to average. We compare you to optimal — specifically, to what your body was capable of when it was functioning at its peak. That's a fundamentally different standard, and it changes everything about how we interpret your numbers.

Here are five biomarkers I consider non-negotiable for any adult over 30 who is serious about protecting their health span.

1. Fasting Glucose

Most physicians check this and move on if it's under 100 mg/dL. I want to see it between 70 and 85 mg/dL.

That gap matters more than it sounds. Fasting glucose creeping from 82 to 96 over a few years isn't "still normal" — it's a directional signal that your metabolic health is eroding. Catching that trend early is exactly the kind of proactive medicine that prevents a pre-diabetes diagnosis five years down the road.

For patients who want a more complete picture, continuous glucose monitoring (CGM) tells us how your body responds to meals, stress, sleep, and exercise in real time — not just in a single fasted snapshot. After eating, we want to see glucose staying below 120 mg/dL. Significant spikes above that, consistently, are worth addressing.

2. Fasting Insulin

This is the one most doctors skip entirely — and it may be the most important number on this list.

Standard lab ranges often list fasting insulin as "normal" up to 25 μIU/mL. I want it below 5 μIU/mL, ideally closer to 2–3. Insulin should be nearly undetectable in a fasted state. If it's elevated, that's a sign your cells are becoming resistant to insulin's signal — even if your glucose still looks acceptable.

Insulin resistance is the upstream driver of an enormous range of age-related disease: cardiovascular disease, type 2 diabetes, cognitive decline, and more. It also directly disrupts hormone balance, energy, and body composition. Yet most people have never had this test ordered.

If your doctor hasn't checked your fasting insulin, ask for it by name.

3. Hemoglobin A1C

A1C gives us a 90-day average of your blood sugar — it's a longer lens than a single fasting number. The conventional alarm threshold is 5.7% (the official start of "pre-diabetes"), but at Infinite Health, we want to see A1C below 5.0%.

The range between 5.0% and 5.6% is where I see a lot of patients who've been reassured they're fine. But that zone represents a slow, measurable drift toward metabolic dysfunction. Left unaddressed, it tends to move in one direction.

One important nuance: A1C is an average. If your glucose is swinging widely — high after meals, low between them — the average can look better than the reality. That's another reason CGM is a valuable companion tool.

4. Cholesterol Risk Ratio

Total cholesterol is a nearly useless number in isolation. What matters is the ratio of total cholesterol to HDL (your "good" cholesterol). Divide total cholesterol by HDL, and the lower that number, the better.

This ratio is calculable from a standard lipid panel — no specialty testing required. It gives a far more meaningful picture of cardiovascular risk than total cholesterol alone, and it's one of the first things I look at when reviewing a patient's metabolic profile.

If you've been told your total cholesterol is "borderline high" without any context around your HDL, triglycerides, or particle size, you're working with an incomplete picture.

5. Free Testosterone

This is the one that surprises people — especially women.

Testosterone is not a male hormone. It is a critical longevity hormone for both sexes. It governs muscle mass, metabolic rate, insulin sensitivity, cardiovascular health, mood, memory, and libido. And it declines steadily — roughly 1–3% per year — beginning in your early thirties.

The distinction between total and free testosterone is essential. Total testosterone measures everything circulating in your blood, but much of it is bound to proteins and biologically inactive. Free testosterone is what your body can actually use.

For men, I look for free testosterone in the range of 180–250 pg/mL. For women, the range is wider and more individual, but I want to see it above 6 pg/mL, with many patients thriving considerably higher than that.

If your testosterone has only ever been checked as a single "total" number — or never checked at all — you may be missing a major piece of your health picture.

What To Do With This

Reading this list and then doing nothing with it would be a waste of your time. Here's what I'd actually recommend:

Request these tests specifically. Fasting glucose, fasting insulin, hemoglobin A1C, a full lipid panel (so we can calculate your risk ratio), and free testosterone. Not every physician orders all of these as routine — you may need to ask.

Get your results interpreted through an optimal lens, not just a normal one. A result that clears the "reference range" bar isn't the same as a result that reflects a well-functioning, aging-resilient body.

Don't treat these numbers in isolation. Biomarkers interact. Testosterone affects insulin sensitivity. Insulin resistance affects hormone balance. A complete picture requires looking at the full pattern — not just chasing a single number.

At Infinite Health, this kind of comprehensive metabolic and hormonal evaluation is exactly where we start. We don't guess, and we don't settle for "you're within normal limits." We look at where you are, where you're heading, and what it's going to take to redirect that trajectory.

Ready to See What Your Numbers Actually Mean?

If you're over 30 and you haven't had a comprehensive metabolic and hormonal panel reviewed by a physician who specializes in longevity medicine, now is the time.

Call us to schedule: (504) 3230025

Our care team will walk you through the process and help you determine the right starting point. Trip Goolsby, MD, sees patients at Infinite Health Integrative Medicine Center in the Greater New Orleans area.

Visit us at www.YourInfiniteHealth.com

The information in this article is for educational purposes and does not constitute medical advice. Lab values and optimal ranges should be interpreted in the context of a full clinical evaluation.