What Causes Insulin Resistance?

a couple of women riding bikes down a road

Have you ever felt like your body is working against you, especially when it comes to managing your weight or energy levels? You might be dealing with something called insulin resistance. It’s a common condition, especially among women, but it’s often misunderstood. As a naturopathic doctor, I see many patients who are frustrated and confused about their health, and insulin resistance is frequently at the heart of the issue.

Let’s break down what insulin resistance is, how it affects your body, and most importantly, what you can do about it. Understanding the “why” behind your symptoms is the first step toward reclaiming your health and feeling vibrant again.

What is Insulin Resistance?

Think of insulin as a key. Your pancreas produces this important hormone to unlock your body’s cells, allowing glucose (sugar) from the food you eat to enter and be used for energy. This process helps keep your blood sugar levels stable and provides your body with the fuel it needs to function.

When you have insulin resistance, the “locks” on your cells become stiff and don’t respond properly to the insulin key. Your pancreas senses this and works overtime, producing more and more insulin to try and force the cells to open up. For a while, this might work, but eventually, your pancreas can get tired. If it can no longer produce enough insulin to overcome the resistance, your blood sugar levels will start to rise, which can lead to prediabetes and eventually Type 2 diabetes. This process can also cause inflammation and is linked to other conditions like Polycystic Ovary Syndrome (PCOS), fatty liver disease, and even some cancers.

What Causes Insulin Resistance?

Insulin resistance doesn’t happen overnight. It usually develops due to a combination of factors, some of which you can control.

Lifestyle Factors

  • Excess Body Fat: Carrying extra weight, especially around your belly, is a primary driver of insulin resistance. The worst part is that insulin resistance can cause weight gain, so this becomes a negative feedback loop. (But it is one we can break!
  • Diet: A diet high in processed foods, added sugars, and unhealthy fats can overwhelm your system and contribute to the problem.
  • Lack of Physical Activity: A sedentary lifestyle means your muscles aren’t using glucose as efficiently, which can worsen insulin sensitivity. Many of us have desk jobs and/or long commutes that can make getting movement difficult, but not impossible!
  • Chronic Stress & Poor Sleep: High stress levels and not getting enough quality sleep can disrupt your hormones, including insulin, making resistance worse.
  • Smoking: This habit is also linked to an increased risk of developing insulin resistance.

Genetic and Other Conditions

  • Family History: If you have a close relative with Type 2 diabetes, your genetic makeup might make you more susceptible.
  • Age: Your risk increases as you get older, particularly after age 45.
  • Hormonal Conditions: Disorders like PCOS, Cushing’s syndrome, and hypothyroidism can cause or worsen insulin resistance. It’s also common as you approach menopause. 
  • Medications: Certain medications, including some steroids, blood pressure drugs, antipsychotics, and HIV treatments, can also contribute to the condition.
group of people sitting in front of table. Some are larger and some smaller, insulin resistance can cause weight gain

How to Know If You Have It

One of the trickiest things about insulin resistance is that it often has no obvious symptoms in the early stages. It’s usually identified during routine blood work or when a doctor is investigating other health concerns.

However, there are some signs that might point to underlying insulin resistance:

  • A waistline over 35 inches for women (or 40 inches for men)
  • Skin tags or dark, velvety patches of skin, especially in the armpits or on the neck (a condition called acanthosis nigricans)
  • High blood pressure (readings of 130/80 or higher)
  • Abnormal cholesterol levels (HDL or “good” cholesterol under 50 for women)
  • High triglycerides (over 150 mg/dL)

Standard clinical tests, like a fasting glucose test or an A1C test, are used to measure your blood sugar levels and, along with a fasting insulin test, can help diagnose prediabetes or insulin resistance.

How to Reverse Insulin Resistance

The good news is that you have the power to improve your body’s sensitivity to insulin. While medication like metformin can be helpful for some, lifestyle changes are the most powerful tool for reversing this condition.

Dietary Changes

  • Eat More Whole Foods: Focus on a diet rich in colorful vegetables, fruits, lean proteins, beans, nuts, and whole grains. The Mediterranean diet is a great example.
  • Increase Soluble Fiber: Foods like oats, apples, and beans have soluble fiber, which helps slow down sugar absorption and improves insulin sensitivity.
  • Reduce Added Sugars and Processed Carbs: Limit sugary drinks, desserts, and refined carbohydrates like white bread and pasta.
  • Choose Healthy Fats: Avoid trans fats and incorporate healthy fats from sources like olive oil, avocados, and nuts.

Lifestyle Adjustments

  • Move Your Body: Aim for regular physical activity. Even a 30-minute walk after meals can make a big difference. Strength training is especially effective because building muscle helps your body use glucose more efficiently.
  • Manage Your Weight: Losing even a small amount of weight (around 5-10% of your body weight) can dramatically improve insulin sensitivity.
  • Prioritize Sleep: Aim for 7-9 hours of quality sleep per night. It’s crucial for hormonal balance.
  • Reduce Stress: Find healthy ways to manage stress, whether it’s through yoga, meditation, spending time in nature, or a creative hobby.

Helpful Supplements and Herbs

Certain supplements and herbs have shown promise in supporting healthy blood sugar and improving insulin sensitivity. Supplements and herbs are real medicine; never begin a supplement without speaking to your naturopathic healthcare provider. Some of these include:

  • Cinnamon: This common spice has been shown to help increase insulin sensitivity.
  • Berberine: Research suggests this compound can be as effective as some medications in controlling blood sugar.
  • Fenugreek, Ginger, and Turmeric: These herbs have demonstrated positive effects on insulin action.
  • Green Tea: Drinking green tea can also help improve your body’s response to insulin.

Always talk to a healthcare provider before starting any new supplement, as they can interact with other medications and may not be right for everyone.

Your Path to Better Health

Insulin resistance can feel daunting, but it is not a life sentence. Early intervention is key. By making mindful changes to your diet, increasing your physical activity, and managing stress, you can significantly improve your insulin sensitivity and prevent the progression to more serious health issues.

It’s a journey of a thousand small steps, and you don’t have to walk it alone. If you feel lost or overwhelmed, working with a knowledgeable practitioner can provide you with a personalized roadmap to success. If you’re ready to take control of your health and reclaim your vitality, I invite you to reach out for an appointment today. Let’s work together to get to the root of your health concerns and help you feel your best.

Book an Appointment Today!

Discover the transformative power of naturopathic medicine for women with Dr. Melissa McCarty. Whether you’re dealing with chronic health issues or seeking preventative care, her integrative approach addresses root causes and fosters a vibrant, balanced lifestyle.

Take the first step towards optimal health.