He’d been managing his diabetes for 20 years. Managing is generous. He was 62, on multiple diabetes medications, seeing an endocrinologist regularly, eating well, staying as physically active as he could. Needed to lose maybe 30 pounds. Not a dramatic case. Not someone who’d given up.
His blood sugar markers would not budge.
Every visit, the same pattern. The endocrinologist would adjust a dose or add another medication. The markers stayed high. The continuous glucose monitor told the same story month after month. He was doing everything he was supposed to do inside the system that was supposed to help him.
It wasn’t working.
Twenty Years of Adding Medications
Think about what 20 years of uncontrolled diabetes looks like from the inside. Two decades of adjusting medications. Two decades of lab results that don’t improve. Two decades of hearing some version of “we’ll try increasing this one” or “let’s add another drug to the mix.”
This patient wasn’t non-compliant. He wasn’t sneaking fast food. He was eating well. He was trying to exercise. He showed up to his appointments. He followed instructions.
The medications kept stacking. The numbers kept sitting in the same stubborn range.
At some point, a reasonable person starts wondering whether the problem is him or whether somebody is missing something.
The Test Nobody Ordered
When this patient finally walked into a functional medicine clinic, the first thing the provider noticed wasn’t his diabetes. It was his testosterone.
Barely registering.
In 20 years of endocrinology visits, across multiple providers and countless blood draws, not one of them had checked his testosterone. Not once.
This is worth sitting with for a moment. An endocrinologist specializes in hormones. Testosterone is a hormone. And for 20 years, it never made the list.
Sex hormones like testosterone, estrogen, and progesterone play a direct role in blood sugar regulation. They work in unison with metabolism. When testosterone drops low enough in a man, the body loses a critical tool for managing glucose. You can throw every diabetes drug on the market at that problem and the numbers won’t move, because the underlying hormonal machinery is broken.
Colin Renaud, PA-C, the provider who treated this patient, explained it simply: “Sex hormones like testosterone, progesterone, estrogen are very much needed to control blood sugar. They kind of work in unison with the metabolism.”
The connection between low testosterone and insulin resistance is well established in medical literature. Studies have shown that men with low testosterone are significantly more likely to develop type 2 diabetes. The relationship runs both directions. Diabetes can lower testosterone, and low testosterone can worsen diabetes. When nobody checks for it, both conditions spiral together for years.
One Month
The provider started testosterone replacement therapy. One month later, the patient’s blood sugar markers dropped significantly.
He was already off a couple of his diabetes medications. His continuous glucose monitor showed something his endocrinologist had never seen in two decades of treatment: he was becoming hypoglycemic. His blood sugar was dropping too low. The old medication doses were now too much because his body was finally regulating glucose the way it was supposed to.
One month. After 20 years.
Let that comparison sit. Twenty years of adding drugs. One month of addressing the actual cause.
“Why Didn’t My Endocrinologist Know This?”
The patient was furious. His exact words, according to Renaud: “Why didn’t my endocrinologist know this? I’ve been seeing my endocrinologist for 15 years.”
That anger is completely justified.
This is what happens when medical care operates in silos. The endocrinologist manages diabetes drugs. That’s the lane. Testosterone falls in a different lane (even though, technically, an endocrinologist specializes in all hormones). The cardiologist manages cholesterol. The gastroenterologist manages the gut. Each specialist works their piece of the puzzle and nobody steps back to look at the full picture.
In this case, the picture was obvious once someone looked. A man with rock-bottom testosterone was never going to get his blood sugar under control with diabetes medications alone. The hormonal foundation that blood sugar regulation depends on was missing.
Renaud’s response to the patient’s frustration was blunt: “I know, man. Don’t know.”
He hears it constantly. Patients come in asking why nobody caught something that, once explained, seems so logical. The answer is almost always the same. The system is set up to manage the disease in front of the provider, not to investigate what’s driving it.
The Rest of the Story
After testosterone stabilized his blood sugar control, the provider added a low-dose GLP-1 medication to further optimize his metabolic health. The patient had never tried one. His previous doctors had mentioned it, but only as another addition to the existing pile of medications. This time, it was used strategically, paired with the hormonal correction that was already working.
Within a couple of months, he’d lost about 12 pounds. He was working out. He was mentally sharp. He was feeling better than he had in years.
“Little testosterone, little GLP-1, and there you go,” Renaud said about the case. The treatment started around December. Just a few months of results from a combination that no one had tried in 20 years of conventional management.
Why This Happens More Than You Think
This is not a one-off case. The pattern repeats across clinics every week. A patient with stubborn metabolic numbers. A specialist who manages the obvious diagnosis. Nobody checking the hormonal environment underneath.
Low testosterone in men over 50 is extremely common. And it’s routinely missed by conventional providers because testosterone falls outside the scope of a diabetes visit. The lab work follows the prescription, not the patient. If the treatment plan is adjusting diabetes drugs, the labs ordered are the ones that monitor diabetes drugs.
It’s efficient. It’s also incomplete.
The same dynamic happens with thyroid disorders, cortisol imbalances, and nutrient deficiencies. Each one can worsen or mimic metabolic disease. Each one sits outside the standard diabetes workup. Each one gets missed when the provider only looks through the lens of one diagnosis.
What This Means If Your Numbers Won’t Move
If you’ve been managing diabetes or metabolic syndrome for years and standard treatments aren’t getting you where you need to be, consider what hasn’t been tested.
Has anyone checked your full hormone panel? Not just your A1C and fasting glucose. Testosterone, free testosterone, estrogen, thyroid (the full panel, not just TSH), cortisol, vitamin D. These aren’t exotic markers. They’re fundamental to how your body processes energy, stores fat, and regulates blood sugar.
A few questions worth asking your provider:
- When was the last time my testosterone was checked?
- Could my hormones be contributing to my blood sugar issues?
- Are there factors beyond my diabetes medications that could be affecting my metabolic health?
If the answers are vague or dismissive, that’s information too.
The 62-year-old man in this story didn’t need a more aggressive diabetes drug. He didn’t need a stricter diet. He didn’t need to try harder. He needed someone to check a hormone that nobody had checked in 20 years.
One test. One month. Two decades of frustration resolved.
That kind of miss should make everyone with stubborn metabolic numbers ask a simple question: what else hasn’t been looked at?
About the Author: Colin Renaud, PA-C practices at Med Matrix (medmatrixusa.com), a functional medicine clinic in South Portland, Maine. With fellowship training in functional medicine and certifications from the American Academy of Anti-Aging Medicine, he specializes in the intersection of hormone health and metabolic disease, helping patients find root causes that conventional specialists miss.
