Insulin resistance in women: signs, tests, and what to do
“I eat like everyone else, but my weight keeps increasing” — the most common phrase among women with insulin resistance. And it’s true: with the same amount of food on their plate, their body stores more as a reserve because insulin is high, while their cells do not respond well to it. This condition is reversible, and the method is based precisely on what reverses it. The entire section — insulin and weight.
What it looks like
Hunger two hours after eating. Sleepiness after lunch. A craving for sweets that is difficult to explain. Abdominal fat despite normal-sized legs. Dark patches of skin on the neck and in the armpits. Papillomas. An irregular cycle. None of these signs alone is a diagnosis, but three or four together are a reason to get a blood test. You cannot judge without testing: insulin resistance also occurs in thin women.
Tests and reference ranges
| Indicator | Reference range | Alert | Comment |
|---|---|---|---|
| Fasting glucose | 3,9-5,5 mmol/L | above 5,6 | late sign, rises last |
| Fasting insulin | 2-10 µU/mL | above 10 | early sign, test together with glucose |
| HOMA-IR | up to 2,7 | above 2,7 | glucose × insulin / 22,5 |
| Glycated hemoglobin | up to 5,7% | 5,7-6,4 | average blood sugar over 3 months |
| Triglycerides | up to 1,7 mmol/L | above 1,7 | rise with high insulin |
Why this is more often linked to hormones in women
Estrogen supports insulin sensitivity. When it drops—in the luteal phase, after childbirth, during perimenopause—insulin resistance increases. The reverse feedback also exists: high insulin causes the ovaries to produce androgens, and this is how PCOS develops. Cortisol adds to this during chronic stress. Therefore, in women, insulin cannot be treated separately from sleep, the menstrual cycle, and stress.
What the method does
Two levers. The first is to eliminate frequent blood sugar spikes: a low-carb plate without flour, sugar, or starch, three meals without snacks. Insulin stops being constantly high. The second is periods without food: a 14/10-16/8 window gives cells time to hear insulin again. Add strength training — muscles take up glucose without insulin at all. Fasting insulin in most women drops by half over 2-3 months, and weight that had stalled starts to move. The nutrition principle is on the method page, the window is explained under intermittent fasting, and how many carbohydrates to keep is covered in the daily carbohydrate limit.
First 30 days
Get fasting insulin and glucose tested
One blood draw, two numbers—you can calculate HOMA-IR yourself. This is the starting point; without it, you won’t know whether it’s working.
Cut out snacks
Three meals a day, with water, tea, and coffee without sugar or milk between them. You’ll feel hungry during the first week, then it will go away.
14/10 eating window
Dinner by 19, breakfast after 9. Extend it to 16/8 when your morning hunger disappears.
Strength training twice a week
Squats, deadlifts, presses, rows. Muscles are the main consumers of glucose, and they don’t need insulin for this.
Retest after 3 months
Insulin and HOMA-IR. A 30-50% drop is normal for this period.
Frequently asked questions
I'm thin. Could I have insulin resistance?
Yes. Thin women with belly fat and a craving for sweets are a typical case. The test settles it.
Do I need metformin?
This is a doctor's decision. Nutrition and the eating window address the same cause without side effects, and they are often enough. If your doctor prescribed it, they can be combined.
How many carbohydrates should I keep?
The method includes vegetables, berries, and a few nuts, with no flour or sugar. The gram guideline is in the article about the daily carbohydrate limit, linked above.
- PCOS and low-carb eating: what really worksInsulin is at the root of most cases of PCOS. Why low-carb eating restores the cycle sooner than weight is lost, and what mistakes are made most often.
- Iron and fatigue: why hemoglobin is normal but you have no energyOne in three women who menstruate lives with iron deficiency despite normal hemoglobin. Ferritin, symptoms, food, and when supplements are needed.
- Thyroid and weight: when it’s not about foodHypothyroidism slows metabolism, and weight increases on the same diet. Which tests to take, at what levels to ease fasting, and how the method works with thyroid disease.
- Belly After 40: Why It Appears and How It Goes AwayBelly after 40 is not “extra food,” but insulin, cortisol, and declining estrogen. Why cardio and a calorie deficit don’t get rid of it and what does.
- Bones and muscles after 45: what you can't regain if you let it goAfter menopause, bones lose up to 20% of their density in 5-7 years, while muscles decline by 1% per year. The only things that stop this are weight-bearing strength training and protein.
- Hot flashes and sleep: what the evidence supports and what is a mythHot flashes and night awakenings disrupt routine and appetite. Triggers you can eliminate, what really helps, and when it’s time to talk to a doctor about hormones.
- Cycle and Hormones
- Insulin, Thyroid and Weight
- After 40: Perimenopause
- A Woman’s Body and Wellbeing
Reviewed by Anastasia Zhukova, Fitness Trainer • Author of a Nutrition and Training System • Creator of an AI Personal Support Platform
A human has reviewed this material against the method and real client practice.