Insulin resistance and type 2 diabetes are very common metabolic issues today. Understanding what insulin resistance is, what the signs look like, and what labs to check can help you start supporting better blood sugar balance.
Many people are told they have high blood sugar and are prescribed medication to manage it. However, the bigger question is why blood sugar is not being balanced in the first place. Blood sugar issues often connect back to cellular health, the liver, lifestyle habits, and overall metabolic health.
The good news is that many aspects of insulin resistance can be supported through nutrition, movement, and addressing underlying issues.
Common Symptoms of Insulin Resistance
Insulin resistance can show up in several ways. Some people have obvious blood sugar problems, while others look healthy but still experience symptoms.
One of the most common symptoms is tiredness after eating. If insulin rises too high after a meal, it can make you feel sleepy, similar to the feeling many people experience after a large meal.
Another common pattern is a blood sugar “yo-yo” effect. Blood sugar rises quickly and then drops quickly, which can lead to:
- fatigue
- jitteriness
- heart palpitations
- energy crashes
Weight gain around the abdomen is also a common sign. This is often described as apple-shaped weight gain, where fat is stored around the belly.
Other possible symptoms include:
- dark pigmentation in the creases of the neck
- skin tags
- increased waist size compared to hips
These symptoms are often associated with metabolic syndrome, which includes a combination of issues such as elevated blood sugar, high triglycerides, elevated blood pressure, and increased body weight.
Insulin Resistance Can Happen Without Obesity
Insulin resistance does not always occur in people who are overweight.
Some individuals have what could be called functional insulin resistance. They may appear healthy but experience energy crashes or fatigue after eating carbohydrates.
In these cases, blood sugar may rise very quickly and then drop quickly. Over time, this repeated pattern can still affect hormones and overall metabolic health.
For example, blood sugar instability can contribute to hormone imbalances and symptoms such as irregular cycles, infertility, or hormone-related changes.
Labs That Help Identify Insulin Resistance
There are three main lab markers that are helpful when looking at blood sugar issues.
Fasting Glucose
Fasting glucose measures blood sugar after not eating for a period of time.
Many lab reports list a normal range somewhere between 65–100 or 70–100. A practical range often considered healthy is around 85–100.
Higher values may suggest blood sugar is increasing over time.
However, normal glucose does not always rule out insulin resistance.
Fasting Insulin
Fasting insulin is a very important marker that is often not checked.
A helpful range is typically around 4–7, and levels above about 5 may suggest some degree of insulin resistance.
Someone can have normal glucose but still have high insulin levels, which means the body is working harder to control blood sugar.
Hemoglobin A1C
Hemoglobin A1C measures the average amount of glucose attached to red blood cells over about 120 days.
Values above 5.7 may indicate insulin resistance or diabetes risk. Many providers begin considering medication when levels reach around 6.3 or higher.
Calculating Insulin Resistance
Insulin resistance can also be estimated using a calculation called HOMA-IR (Homeostatic Model Assessment for Insulin Resistance).
The formula is:
Fasting insulin × fasting glucose ÷ 405
In general:
- Around 1 suggests healthy insulin sensitivity
- Around 3 may reflect significant insulin resistance
There are many online calculators that allow you to easily enter these values.
Other Labs That May Be Affected
Blood sugar problems often affect other metabolic markers.
For example, a lipid panel may show:
- low HDL (healthy cholesterol)
- higher LDL
- elevated triglycerides
Other markers sometimes associated with blood sugar instability include lactate dehydrogenase (LDH) and carbon dioxide levels.
LDH values below about 140 can suggest blood sugar dysregulation, especially when blood sugar fluctuates frequently.
Carbon dioxide ideally falls between 25–30, while lower levels may also reflect blood sugar instability.
Conditions Commonly Linked to Insulin Resistance
Insulin resistance often occurs alongside other health issues, including:
- metabolic syndrome
- heart disease
- obesity
- type 2 diabetes
- PCOS
Blood sugar imbalance can also increase both stress and inflammation in the body.
When blood sugar rises, insulin increases and can contribute to inflammation. When blood sugar drops too low, cortisol rises to bring it back up, increasing stress on the body.
Over time, this cycle can affect overall health.
Steps That Help Reverse Insulin Resistance
Supporting insulin resistance generally focuses on three main areas: nutrition, movement, and addressing root issues.
Nutrition
Nutrition is a key factor in blood sugar regulation.
Helpful habits may include:
- eating two to three meals per day
- spacing meals four to five hours apart
- focusing on balanced meals
In some cases, a short-term ketogenic diet may help improve insulin sensitivity for a period of time.
Adequate protein intake is also important.
Movement and Exercise
Movement improves insulin sensitivity and metabolic health.
Helpful forms of activity include:
- walking
- weightlifting
- high-intensity interval training
A practical goal is around 10,000 steps per day, since regular walking supports insulin sensitivity.
Addressing Root Causes
If blood sugar does not improve with nutrition and movement, underlying factors may be involved.
Possible contributors include:
- infections
- chronic toxins
- hormone imbalances
- nutrient deficiencies
- stress hormone imbalance
- gut-related issues
Reducing inflammatory triggers and supporting overall health can help improve blood sugar regulation.
Nutrients That May Support Blood Sugar Balance
Several nutrients may help support insulin sensitivity, including:
- protein
- magnesium
- chromium
- zinc
Other compounds sometimes used for blood sugar support include artichoke and berberine.
Chromium deficiency is often seen with insulin resistance and may affect insulin function.
Other Lifestyle Factors That Affect Blood Sugar
Certain lifestyle factors can also influence insulin resistance.
For example, caffeine can increase cortisol levels. Cortisol plays a role in blood sugar regulation, so high caffeine intake may contribute to instability in some individuals.
Food reactions can also affect metabolic health. Certain foods may trigger immune responses that irritate digestive organs such as the pancreas. Dairy is one example that may cause reactions for some people.
Removing foods that trigger inflammation may improve blood sugar stability.
Final Thoughts
Insulin resistance is common, but it is also highly influenced by lifestyle and metabolic health.
Improving nutrition, increasing movement, reducing inflammatory triggers, and addressing underlying health issues can all help support healthier blood sugar regulation.
With consistent changes, many people can significantly improve insulin sensitivity and overall metabolic health.
If you are considering taking a prescription medication, seek the care and advice of a medical professional. This is my take on nutritional supplements, not medications.
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If you aren’t too short on time, tune into my podcast below to listen more about Reversing Insulin Resistance and Type 2 Diabetes.