The silent health threat most people ignore

December 5, 2025

A few years ago, I was doing all the right things.

Training consistently, eating “pretty well”, and assuming the daily energy crashes were part of just getting older.

That’s when I took my first blood panel.

And boy was it an eye-opener. Elevated fasting insulin. High triglycerides. And a thicker wastline to boot.

All of these are signs of a hidden disorder common among many who “seem healthy”:

Insulin resistance.

Now let’s not be confused here. We’re not talking about a lack of fitness. This is metabolic dysfunction. And it wreaks havoc on your body systems—often silently—if left unchecked.

So let’s unpack what’s really happening when you’re “insulin resistant”—and how to get your system in order.

Insulin is like your body’s traffic controller.

Many people have heard of insulin. Few actually know what it does.

Its main job is fairly simple. Move glucose from your blood to your muscle (or liver).

In a healthy system, when blood sugar goes up, insulin does it’s job, and levels quickly normalize.

The problem is things like inactivity, poor diet, and poor sleep cause cells to resist insulin. Insulin goes up, yet blood sugar doesn’t budge.

So how does the body respond? It pumps out more and more insulin. Which leads to:

Buildup of glucose and insulin
Increased fat storage (insulin boosts storage of fat as well as glucose)
Energy crashes

Most people will tell you their metabolic issues are due to their “slow metabolism”.

In reality they’ve got a jammed fuel system.

You can “look fine” and still be metabolically broken.

Here’s the scary thing:

Insulin resistance creeps up silently. You can look “healthy” while it builds quietly over years or decades. But there are warning signs.

Often these are more “felt” than anything that might show on your labs:

Cravings
Brain fog
Waist gain
Poor sleep
Afternoon crashes

Yet these are all red flags for internal (and invisible) metabolic disarray. I’ve experienced them all myself. Lucky for me, I acted early. But don’t leave this to guesswork—make sure your blood work shows the following:

HbA1c: 5.5–5.7%
Fasting insulin: <8mIU/L
Triglycerides: <150 mg/dL
Fasting glucose: <100 mg/dL

If these numbers are in check, you’re probably in good metabolic shape.

If not, you’re a sitting duck for a whole host of health problems.

The cost of ignoring insulin resistance isn’t just diabetes.

If you’re insulin resistant, then sure, your blood sugar will be high. But the issues run deeper than that.

When insulin resistance pushes all the way to full-blown type 2 diabetes, your pancreatic beta cells have basically burned out from working overtime pumping out insulin nonstop for years. So, they stop doing it at all. After that the only way you’re getting insulin into your system is with a daily needle.

But don’t kid yourself into thinking this is all about diabetes, either. The reality is rampant insulin resistance hits every major system hard:

Heart: arterial stiffness and inflammation.
Brain: impaired glucose utilization, brain fog + increased dementia risk.
Liver: fat accumulation (non-alcoholic fatty liver).
Hormones: disrupted testosterone/estrogen balance, libido/mood drops.
Muscle: reduced protein synthesis - leading to loss of lean mass.

Think of insulin resistance like a “gateway” condition.

Once it takes hold, it opens the floodgates to a whole host of chronic diseases.

Step one is awareness. So test, don’t guess.

Testing is critical here. Providing you’re testing the right things.

The problem is standard tests like fasting glucose or HbA1c often miss early metabolic dysfunction. Why? Because insulin resistance often occurs before spikes in blood glucose or insulin.

So if you really want to see what’s happening, you need to track early markers of metabolic chaos:

HOMA-IR (<1.0)
Waist-to-height ratio (<0.5)
Fasting insulin (<8 mIU/L ideal)
Triglyceride-to-HDL ratio (<1.0)

A couple years ago I started tracking my numbers quarterly. Within six months of changing my routine (more on that later), I’d halved my fasting insulin and normalized my triglycerides.

It’s absolutely true when they say you can’t manage what you don’t measure.

Our concierge doctors at Rebel Health track the right early markers, plus use CGMs (continuous glucose monitors) for real-time monitoring where appropriate.

Tracking over time (sometimes in real-time) gives you direct insight into how your food and activity impact the metrics that matter.

That’s when real behaviour change becomes effortless, not guesswork.

You can’t fix what you don’t measure. Data turns awareness into progress.

Movement is medicine (especially strength work).

No pill can rival what muscle activity can do for your insulin sensitivity.

Just contracting your muscles draws in glucose from your circulation—no insulin required.

And you know where the biggest “sink” for glucose is, right?

Yep, it’s muscle. Building it is like a one-two punch for metabolic dysfunction: you pull the plug AND you build a bigger sink.

I used to think more cardio was the answer to getting my blood sugar under control. Only when I switched to consistent lifting did I no longer get those post-meal or afternoon energy crashes.

Here’s what works best for most people:

2–3 strength sessions per week focused on large muscle groups (legs, back, chest).
Short movement “snacks” after meals—2–5 minutes of walking, squats, or stairs.
One higher-intensity session weekly (intervals or hills) to drive up mitochondrial capacity.

Just a single lifting session is enough to improve insulin sensitivity for up to 48 hours.

Stack that week-on-week and you’re literally re-educating your cells on how to use insulin.

Every rep teaches your muscles how to use fuel again. Muscle = metabolic medicine.

Fixing your fuelling matters—but it’s not about extremes.

Let’s cut through the noise on diet and metabolic health.

Look, many approaches can work. Low-carb, keto, fasting, you name it. Why? Because they all reduce insulin burden. At least in the short-term anyway.

The real key here is metabolic flexibility. Long-term, your ability to deal with BOTH carbs and fat efficiently is the real game-changer.

What worked for me is:

Prioritize protein first (1.6–2.0 g/kg bodyweight).
Fill the rest with whole-food carbs and healthy fats based on activity levels.
Limit ultra-processed snacks and liquid calories.

That’s it. And small tweaks made the difference too. When I switched my “healthy” oat smoothie to an alternative stacked with protein (whey, greek yogurt, berries, nut butter), my CGM spikes dropped by half and my energy no longer crashed before 11am.

Our RHA clinical dieticians take a similar approach. They individualize your plan based on carb tolerance, help you prioritize protein and high-quality veg, and tailor everything so it fits YOUR lifestyle.

Sleep and stress are hidden insulin triggers.

Wearing a CGM has been a game changer for spotlighting hidden metabolic triggers.

A few months ago I had about a week of poor sleep. Not only was my energy down, but my glucose was up ~9 mg/dL. No change in food or extra calories. Just sleep debt.

When your sleep tanks, insulin resistance jumps almost overnight. That’s how sensitive the system is.

So the recovery piece matters:

7–8 hours minimum, in a dark, cool room.
Consistent wake time beats bedtime perfection.
Short daily “decompression” ritual: walk, journal, or breathing.

That’s why our RHA clinicians track metrics like HRV and cortisol. Sometimes insulin resistance won’t budge despite good nutrition or exercise habits—and often chronic stress is the culprit.

Good sleep is one of the most overlooked insulin-sensitizing tools.

Supplements can help (after you’ve nailed the basics).

Training, nutrition, and sleep are by far the biggest levers for metabolic health.

Anything else is absolutely secondary.

But providing you’ve got these dialled in, there are ways to level up your system:

Creatine (3–5 g/day): may enhance glucose uptake.
Magnesium glycinate (~300 mg): supports insulin signaling.
Omega-3s (1–2 g EPA/DHA): reduce triglycerides/inflammation.
Berberine or GLP-1 peptides: prescribed medically when needed.

Our RHA clinicians integrate these approaches into personalized medical plans, not some influencer stack you saw on TikTok.

The real goal is metabolic flexibility, not perfection.

Reversing (or avoiding) insulin resistance isn’t about chasing numbers. It’s actually about regaining control of your body’s energy systems.

Metabolic flexibility is about switching fuels on demand. Burn carbs when you just ate, burn fat when you haven’t.

When the switch gets stuck, that’s metabolic inflexibility. Your body keeps pumping out insulin to force glucose into cells. Chronic high insulin = insulin resistance.

When you regain the switch, you regain control.

And when you do, you feel it:

Cravings drop.
Mental sharpness returns.
Meals don’t make you sleepy.
Workouts actually recharge you.

It’s measurable too: better fasting insulin, CGM stability, higher HRV all point to a flexible metabolism.

Once you get there, maintaining is easy: lift, move often, eat real food, sleep well, control stress.

Rinse and repeat.

Why we take a coordinated medical approach at RHA

We do things differently at RHA.

It’s easy to find metabolic “protocols” sold by internet gurus chasing clicks, not data.

Our comprehensive, multidisciplinary approach removes the guesswork and implement effective protocols tailored to your unique needs.

Our process combines:

Physician oversight to rule out thyroid, liver, or hormonal causes.
Advanced labs tracking insulin, lipids, inflammation, and body composition.
Exercise physiology input to design feasible strength protocols that fit your schedule.
Nutrition and coaching support to keep it sustainable.

Think of it like high-grade medicine meeting real-world application. It’s exactly the system I wish I had access to when my numbers started kicking off years ago.

We help you test, adjust, and track until your metabolism works for you again.

The bottom line

Don’t be fooled into thinking “healthy” is all about looking that way.

Insulin resistance isn’t just common, it’s silent too. Leave it unmanaged for too long and you’ll have far more problems than high glucose or insulin.

The good news is it’s reversible. The earlier you act, the faster you can turn things around. I’ve seen it personally and in the hundreds of clients we’ve helped at RHA.

Think of your muscles, meals, and sleep as metabolic levers, not chores you think you should do because someone told you to.

If you’ve experienced the telltale signs of insulin resistance first-hand, or if you’re curious on where you stand, book in a personalized consultation with our clinical team today.

Stay (metabolically) flexible,

—John

Quick disclaimer: This reflects my personal approach and data; Rebel Health Alliance is a medical practice—talk to our concierge doctors for individualized care.