Insulin Resistance and Weight Loss: Signs, Causes and How to Reverse It
Updated: Nov 2
The quick answer: Insulin resistance happens when your cells stop responding well to insulin, so your body has to make more and more of it to keep blood sugar in range. High insulin makes it hard to burn fat, which is why so many women eat less, exercise more and still can't lose weight. The good news: it can often be improved with how and when you eat.
Think this might be you? Book a free consultation with me.
Have you tried everything?
Have you cut calories to lose weight, and it didn't last?
Have you exercised more, but the scale won't budge?
Have you tried low carb, Weight Watchers, keto and more?
If you nodded along, you're not lazy and you're not failing. Insulin resistance may be working against you. Here's how to tell, and what to do about it.
What is insulin?
Insulin is a hormone your pancreas releases when you eat. Its job is to move sugar (glucose) out of your bloodstream and into your cells for energy. When there's more sugar than your body needs right away, insulin helps store it, first in your liver and muscles, and then as body fat.
Insulin is a storage hormone. When insulin is high, your body is in storage mode, and fat burning is put on pause.
What is insulin resistance?
Insulin resistance happens when your cells become less responsive to insulin. Sugar has a harder time getting into your cells, so your pancreas pumps out even more insulin to compensate. Over time, insulin stays high, blood sugar starts to creep up, and weight gain (especially around the middle) becomes very hard to reverse. Left unchecked, insulin resistance can lead to prediabetes and type 2 diabetes.
What causes insulin resistance?
Eating all day long. Constant snacking and grazing keep insulin raised from morning to night.
A diet high in processed food and sugar. Refined carbs, sugary drinks and unhealthy trans fats spike blood sugar again and again.
Chronic inflammation. Often driven by processed foods, alcohol and industrial seed oils.
Not moving enough. Muscle is one of the biggest users of glucose. A sedentary lifestyle means less muscle and more insulin needed.
Hormonal imbalance. Conditions like PCOS are closely linked with insulin resistance.
Poor sleep and stress. Both raise stress hormones that push blood sugar up.
Signs and symptoms of insulin resistance
Feeling sluggish or sleepy after eating carbs
Strong sugar or carb cravings
Weight gain, especially around your belly, that won't come off
Feeling hungry soon after meals
Bloating and gas after carb-heavy meals
Mood swings and energy crashes
Skin tags or dark, velvety patches of skin on the neck or underarms
High triglycerides, low HDL (good) cholesterol or high blood pressure on your lab work
Lab tests to ask your doctor about
There's no single perfect test, but these numbers together paint a clear picture:
Test | What it tells you | Healthy range |
Fasting glucose | Your blood sugar after an overnight fast | 70 to 99 mg/dL |
A1c | Your average blood sugar over 2 to 3 months | Under 5.7% |
Fasting insulin | How hard your pancreas is working (often the first number to rise) | Ask your doctor; many practitioners like to see it low |
Triglycerides : HDL | A simple clue to insulin resistance from a standard lipid panel | Lower is better; a higher ratio can be a red flag |
Only your doctor can diagnose insulin resistance, prediabetes or diabetes. Bring this list to your next appointment.
How to reverse insulin resistance and start burning fat
The goal is to lower how much insulin your body makes, and how often. Here's where I start with my clients:
Eat less often. Stop snacking and eat 2 to 3 complete meals a day.
Close the kitchen after dinner. Avoid late-night eating.
Try intermittent fasting. Start gently with a 12-hour overnight fast. My Beginner's Guide to Intermittent Fasting walks you through it.
Build meals around protein, healthy fat and fiber. Cut back on processed carbs, sugar and seed oils.
Move every day, and lift something heavy. A walk after meals and a little strength training help your muscles use glucose.
Protect your sleep and manage stress. Both have a direct effect on blood sugar.
For simple, daily habits to keep insulin low, read How to Lower Insulin Naturally: 7 Habits to Reduce Cravings and Hunger and my 10 Blood Sugar Hacks.
Want the science? Listen to this podcast on how to burn fat and reverse insulin resistance.
Insulin resistance FAQ
Can insulin resistance be reversed?
For many people, yes. Eating less often, cutting back on processed carbs and sugar, moving more, sleeping well and losing even a little weight can all improve how your body responds to insulin. Work with your doctor, especially if you take medication.
Why can't I lose weight with insulin resistance?
High insulin keeps your body in storage mode, making it hard to access stored fat. Eating less but eating often can keep insulin high all day, which is why lowering how often you eat often works better than simply cutting calories.
Is insulin resistance the same as prediabetes?
Not exactly. Insulin resistance often comes first, sometimes years before blood sugar rises. Prediabetes means your blood sugar is already above the normal range (a fasting glucose of 100 to 125 mg/dL or an A1c of 5.7% to 6.4%).
Does intermittent fasting help insulin resistance?
Intermittent fasting gives your body long breaks from insulin, which can improve insulin sensitivity. Start with 12 to 14 hours overnight and build slowly. If you take insulin or medication that lowers blood sugar, talk with your doctor first.
Ready to reverse insulin resistance?
If you want to burn body fat, balance your hormones and finally see the scale move, let's build a plan that fits your lifestyle. Book a free 60-minute consultation.
Disclaimer: This content is for education only and is not medical advice. It is not intended to diagnose, treat or prevent any disease. Please talk with your doctor before changing your diet, exercise or medication.
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