Hi, I’m Jen — certified health coach and integrative nutritionist with 12+ years specializing in helping women reset metabolic health, regulate blood sugar, and retrain the body to release weight. I help women with high A1C and insulin resistance address the root causes keeping their numbers stuck (because most eat well) — through the Whole GI Protocol™, a complete two-layer framework that addresses both what you eat AND what’s happening underneath.
Table of Contents
Why food alone isn’t moving your numbers
The four non-food root cause drivers
Sleep — the metabolic function hiding in plain sight
Stress & Cortisol — your body is raising your blood sugar from the inside
Inflammation — the quiet interference
Hormones — why what worked before stopped working
I want to start with something worth sitting with for a moment.
Your body raises blood sugar on its own. Without you eating a single thing.
No bread. No rice. No fruit. No nothing. And your blood sugar can still go up.
If you’ve been eating well and your numbers aren’t moving, I know how disorienting that can feel. Like you’re doing everything and still failing some test you didn’t sign up for. But, honestly, this usually means your food is probably not the problem.
Something else is. And that something has a name. Actually — four names.
The four non-food root cause drivers
These are the four areas I assess with every single client through our Root Cause Mapping™ process. In 12+ years of doing this work, I have rarely — if ever — met a woman whose blood sugar numbers were driven purely by diet. Almost always, at least one of these is running quietly in the background. Sometimes two. Sometimes all four. Because #hormones.
This matters because if you’re addressing your food but not these, you actually have an incomplete picture of your health. Your diet can only take you as far as the rest of your body will allow it to go.
So, I’ll cover the root causes below for you to see what you identify with most.
Root Cause 01: Sleep — the metabolic function hiding in plain sight
Sleep is a metabolic function. Not just a rest function. A metabolic one.
While you sleep, your body is regulating cortisol, repairing insulin receptors, clearing inflammatory byproducts, and resetting the hormonal signals that govern your hunger and blood sugar the following day. Sleep is doing maintenance work every single night — and when that’s disrupted, the morning-after effects are measurable.
One night of poor sleep raises fasting blood glucose. A single night. Research has shown that even partial sleep restriction can impair insulin sensitivity across multiple metabolic pathways — not because of anything the person ate, but because of one disrupted night.¹ A separate study found that restricting sleep to five hours per night for just one week significantly reduced insulin sensitivity in healthy adults.² And research focused specifically on women found that a mild sleep deficit maintained over six weeks increased insulin resistance by nearly 15% — with postmenopausal women experiencing effects closer to 20%.³ ⁴
Now think about what a pattern of poor sleep does over months and years.
A few things I see consistently in clients with sleep issues and stubborn blood sugar numbers:
Waking between 2–4am — this is often a cortisol and blood sugar regulation issue, not just stress
Feeling unrefreshed even after a full night, which suggests the sleep quality isn’t restorative
Afternoon energy crashes that feel almost mandatory
Relying on caffeine past noon just to function
If any of those sound familiar: sleep is worth putting at the TOP of your list, not the bottom where most people file it. For blood sugar regulation, it is foundational.
Root Cause 02: Stress & Cortisol — your body is raising your blood sugar from the inside
Cortisol is a blood sugar hormone.
When you’re stressed — whether that’s an acute stressor like a hard conversation, or the chronic kind, like financial pressure, caregiving, or simply carrying the weight of a very full life — your body releases cortisol. Cortisol’s job, evolutionarily, is to prepare you to respond to a threat. Part of how it does that is by signaling your liver to release glucose into the bloodstream.⁵ Fast energy. Fight or flee.
Except most of us aren’t fighting or fleeing. We’re managing three people’s schedules, lying awake at 3am, or carrying a health diagnosis that brings its own layer of anxiety. The cortisol still releases. The glucose still rises. And then insulin has to show up and deal with it.
Research tracking the relationship between cortisol patterns and fasting glucose over six years found a clear longitudinal association between the two — with cortisol changes preceding and predicting changes in blood sugar.⁶ Do that on repeat, day after day, and you have chronically elevated cortisol, chronically elevated blood sugar, and an insulin response working overtime. That’s insulin resistance developing — not from what you ate, but from how your nervous system has been living.⁷
I also want to name this directly: the stress of watching your numbers, the anxiety of a prediabetes diagnosis, the pressure to be doing everything right — that cortisol response is real. It can work against the very thing you’re trying to improve. I see this often. It’s worth being genuinely gentle with yourself about it. ❤️
Root Cause 03: Inflammation — the quiet interference
Chronic, low-grade inflammation is probably the most underestimated driver of insulin resistance — because it often doesn’t feel like much of anything.
It’s not dramatic. It’s not acute pain. It’s more like a low hum. Bloating that’s just kind of always there. Joint stiffness in the morning you’ve normalized. Brain fog you’ve attributed to getting older. Skin that’s more reactive than it used to be.
That low hum directly interferes with insulin signaling at the cellular level.
Here’s how it works: your cells have insulin receptors — little docking stations where insulin delivers its message to take in glucose. Inflammation physically impairs those receptors. Pro-inflammatory cytokines interfere with insulin receptor signaling, reducing the cell’s ability to respond to insulin’s message.⁸ The insulin shows up, tries to deliver its signal, and gets muffled or blocked. Your cells become less responsive. Your pancreas compensates by producing more insulin. More insulin, less response, higher blood sugar. That’s insulin resistance — driven not by what you ate, but by the inflammatory environment your body is living in.⁹ ¹⁰
Common sources I see in clients: gut dysbiosis, food sensitivities (not full allergies, but slow-burn immune reactions), environmental toxins, and the metabolic stress of blood sugar fluctuations themselves — which creates inflammation, which worsens insulin resistance, which creates more inflammation. It becomes circular.
The gut piece is worth highlighting specifically. A disrupted gut microbiome impairs glucose metabolism, and high blood sugar feeds the harmful bacteria that keep the dysbiosis going. When someone has both digestive symptoms and blood sugar issues, they’re usually looking at the same root — not two separate problems.
🌸 Root Cause 04: Hormones — why what worked before stopped working
This one is for the woman thinking: I used to be able to eat this way and it worked. Now it’s like my body changed the rules overnight.
She’s not wrong. Her body did change the rules. Because estrogen changed.
Estrogen plays a significant role in insulin sensitivity. It supports the function of insulin receptors, helps regulate how the body stores and uses fat, and contributes to glucose metabolism in ways that most women — and honestly, many healthcare providers — never learn about. When estrogen is stable, it’s doing a lot of quiet protective work in the background.
In perimenopause and menopause, that changes. As estrogen declines, the body becomes measurably less responsive to insulin.¹¹ Women who had no blood sugar issues in their 30s begin seeing elevated readings in their mid-to-late 40s. Women with mildly elevated numbers watch them climb. Not because they changed their diet — but because the hormonal foundation everything was sitting on shifted.¹²
Progesterone, testosterone, and thyroid hormones are also part of this picture. They all interact with insulin in ways that matter. Research confirms that estrogen deficiency — whether from natural menopause or surgical menopause — has a measurable adverse effect on insulin resistance, and that the influence of testosterone on blood sugar regulation also shifts in the absence of estrogen.¹³
This is also why standard advice often fails women in midlife. The approach that worked at 38 may genuinely not work at 48, 68, 88… — because the body you’re working with is not the same body. The protocol needs to account for that.
So what do you do?
Reading through those four drivers, you likely felt a pull toward one or two of them. That pull is information — and it’s a genuine starting point.
As always, please work alongside your healthcare provider as you explore any of this. Your doctor is your partner in this process. ❤️
With you, Jen
References
¹ Donga E, et al. “A single night of partial sleep deprivation induces insulin resistance in multiple metabolic pathways in healthy subjects.” Journal of Clinical Endocrinology & Metabolism, 2010. https://pubmed.ncbi.nlm.nih.gov/20371664/
² Tasali E, et al. “Sleep restriction for 1 week reduces insulin sensitivity in healthy men.” Diabetes, 2012. https://pmc.ncbi.nlm.nih.gov/articles/PMC2927933/
³ St-Onge M-P, et al. “Chronic insufficient sleep in women impairs insulin sensitivity independent of adiposity changes.” Diabetes Care, 2023. https://www.cuimc.columbia.edu/news/shortening-sleep-time-increases-diabetes-risk-women
⁴ Knutson KL, et al. “Sleep disorders and the development of insulin resistance and obesity.” Endocrinology and Metabolism Clinics of North America, 2013. https://pmc.ncbi.nlm.nih.gov/articles/PMC3767932/
⁵ Andrews RC, et al. “Abnormal cortisol metabolism and tissue sensitivity to cortisol in patients with glucose intolerance.” Journal of Clinical Endocrinology & Metabolism, 2002.
⁶ Dias JP, et al. “The longitudinal association of changes in diurnal cortisol features with fasting glucose: MESA.” Psychoneuroendocrinology, 2020. https://www.ajmc.com/view/stress-hormone-cortisol-associated-with-increased-blood-sugar-in-t2d-population
⁷ Perez JJ, et al. “Cortisol is negatively associated with insulin sensitivity in overweight Latino youth.” Journal of Clinical Endocrinology & Metabolism, 2011. https://pmc.ncbi.nlm.nih.gov/articles/PMC3050109/
⁸ Shoelson SE, Lee J, Goldfine AB. “Inflammation and insulin resistance.” Journal of Clinical Investigation, 2006. https://pmc.ncbi.nlm.nih.gov/articles/PMC2246086/
⁹ Rehman K, Akash MSH. “Mechanisms of inflammatory responses and development of insulin resistance: how are they interlinked?” Journal of Biomedical Science, 2016. https://link.springer.com/article/10.1186/s12929-016-0303-y
¹⁰ Zatterale F, et al. “Chronic adipose tissue inflammation linking obesity to insulin resistance and type 2 diabetes.” Frontiers in Physiology, 2020. https://pmc.ncbi.nlm.nih.gov/articles/PMC4468292/
¹¹ Jiang X, et al. “Effect of hormone therapy on insulin resistance in healthy postmenopausal women: a systematic review and meta-analysis of randomized placebo-controlled trials.” The Menopause Society Annual Meeting, 2024. https://menopause.org/press-releases/new-meta-analysis-shows-that-hormone-therapy-can-significantly-reduce-insulin-resistance
¹² Tramunt B, et al. “Sex differences in metabolic regulation and diabetes susceptibility.” Diabetologia, 2020. https://ajp.amjpathol.org/article/S0002-9440(21)00245-5/fulltext
¹³ Espinosa De Ycaza AE, et al. “Associations of estrogen and testosterone with insulin resistance in pre- and postmenopausal women with and without hormone therapy.” Endocrine Practice, 2011. https://pmc.ncbi.nlm.nih.gov/articles/PMC3693666/