Understanding Blood Sugar And Insulin Resistance During Perimenopause

I was gaining weight despite not eating more. This was not in my head. This was not my imagination. My clothes did not fit. The scale kept going up, month after month. I could trace the weight gain precisely. Two years prior I weighed 145 pounds. Now I weighed 162 pounds. I had not changed my eating habits. If anything, I was more careful about what I ate than I had been before. Then my doctor tested my blood sugar and insulin levels. The results came back and my doctor said those three words I had been hoping to hear: insulin resistance. That explained everything. That explained the weight gain that seemed to happen for no reason. That explained the sugar cravings that felt like compulsions. That explained the energy crashes that made me want to collapse on the couch at 3 PM every day. Once I understood what was happening, I could address it. What felt like a personal failure was actually a predictable metabolic shift tied to hormonal changes. Learning this distinction was liberating. It meant I could stop blaming myself for being lazy or undisciplined. It meant I could stop blaming myself and start blaming biology. And more importantly, it meant I could fix it with targeted strategies instead of throwing more willpower at the problem.

How I got here

During perimenopause, my metabolism changed. I was gaining weight even though my eating habits had not changed. I was also craving sugar constantly. Those cravings were intense, not like normal appetite. I would see sugar and feel a compulsion to eat it that I had never experienced before. I was having energy crashes where my energy would plummet in the afternoon, leaving me unable to focus or function. I was frustrated because I was doing everything right. I was exercising. I was eating reasonably well. I was not eating excess calories. Yet my body was working against me. I felt betrayed by my own metabolism. The scale crept up month after month, and I had no explanation for why. My doctor dismissed my concerns, suggesting I simply needed to eat less and exercise more. That advice made me feel worse because I was already doing both.

What I actually did

My doctor explained that estrogen helps regulate glucose metabolism and insulin sensitivity throughout the body. Estrogen increases the expression of insulin receptors on cells, making cells more responsive to insulin. When estrogen declines during perimenopause, insulin resistance can develop as a direct result of hormonal changes. This is not your fault. This is not laziness. Insulin resistance is a physiological response to declining estrogen that happens to women's bodies during this transition. Insulin resistance leads to weight gain, sugar cravings, energy crashes, brain fog, and eventually metabolic and blood sugar problems if left unaddressed. She recommended dietary changes focused on stabilizing blood sugar rather than restricting calories. I eliminated refined carbohydrates and added sugar because these foods cause rapid blood sugar spikes followed by crashes. This was harder than expected because my brain was literally signaling for these foods due to unstable blood sugar. My brain's reward system was hijacked by the blood sugar rollercoaster. I increased protein intake at every meal, focusing on foods like chicken, fish, eggs, Greek yogurt, legumes, and tofu. Protein stabilizes blood sugar and keeps cravings in check because it digests slowly and provides sustained energy. I added more non-starchy vegetables and switched to whole grains instead of refined grains. Whole grains have fiber which slows glucose absorption. I started exercising regularly, particularly strength training which improves insulin sensitivity more effectively than cardio alone. Muscle tissue is more metabolically active and uses glucose efficiently. I added stress reduction practices like meditation and deep breathing, which have a direct impact on insulin function. Stress hormones like cortisol directly interfere with insulin sensitivity. I tracked my blood sugar patterns with a simple logbook and eventually with a continuous glucose monitor, which showed me exactly which foods triggered blood sugar spikes and which ones kept me stable. This data was revelatory. I learned that some foods I thought were healthy actually spiked my blood sugar significantly. Within a few weeks, my cravings decreased significantly and my afternoon energy crashes became less severe. Within a few months, I had lost weight without restricting calories. The weight loss came naturally when my blood sugar and insulin were regulated, because my body was no longer in a state of constant metabolic dysfunction and overproduction of insulin. I also noticed improvements in my mood, my mental clarity, my skin quality, and my overall sense of wellbeing.

What actually changed

My blood sugar stabilized completely. Instead of the afternoon crashes that used to leave me on the couch unable to move, my energy remained consistent throughout the day. My insulin sensitivity improved, which I could tell from decreased hunger, fewer cravings, and more stable moods. My cravings for sugar decreased dramatically, though it took about 6 weeks before I stopped wanting sugar every day. My energy stabilized and I no longer experienced the 3 PM wall that had become my daily reality. I lost weight without restricting calories. I lost about 12 pounds over 4 months without dieting, simply by stabilizing my blood sugar. But more importantly than the number on the scale, I felt so much better. I felt like myself again. I felt capable and strong instead of constantly fighting my body. Everything improved when I addressed the underlying blood sugar dysfunction.

What my routine looks like now

My daily eating pattern focuses on blood sugar stability as the organizing principle of my nutrition. I eat balanced meals with protein, healthy fats, and complex carbohydrates at regular intervals, never skipping meals or going long stretches without eating. I avoid refined carbohydrates and added sugar completely. For breakfast, I might have eggs with whole grain toast and berries instead of the oatmeal I used to eat because eggs provide protein and fat that stabilize blood sugar while oatmeal can cause spikes. For lunch and dinner, I include a protein source, plenty of vegetables, and a complex carbohydrate like brown rice or sweet potato. I snack on protein-rich foods like nuts, cheese, or Greek yogurt when I need something between meals, recognizing that snacking strategically prevents blood sugar crashes that lead to cravings. I drink plenty of water and herbal tea, which helps with satiety and prevents me from confusing thirst with hunger. I exercise regularly, combining strength training 2-3 times per week with walking or other moderate cardio, knowing that strength training is particularly important for insulin sensitivity. I practice stress management through meditation, journaling, and time in nature because stress hormones directly interfere with insulin function. I continue to track my blood sugar and energy patterns using PeriPlan, which helps me see patterns and adjust my approach as needed. My metabolism is stable and my weight has remained stable for over a year. I feel energized and healthy and no longer at war with my body.

If you are gaining weight during perimenopause despite not eating more, you might have insulin resistance. Talk to your doctor about testing your blood sugar and insulin levels. Ask for a fasting glucose test, an insulin test, and ideally a glucose tolerance test to get a complete picture. Dietary changes and exercise can improve insulin sensitivity dramatically. You do not have to just accept perimenopause-related weight gain. Get tested and get help. Work with a healthcare provider who understands the metabolic changes of perimenopause and can help you address them systematically. This content is for informational purposes only and does not replace medical advice. Always consult your healthcare provider about your specific situation.