Why can fasting glucose remain normal even when insulin resistance is present?
The pancreas compensates by producing extra insulin so glucose stays normal for years; elevated insulin masks the underlying resistance until compensation fails.
Video Summary
Insulin resistance can develop for years while blood sugar tests remain normal because the pancreas compensates with higher insulin.
Early warning signs include increased hunger after meals, strong carb/sugar cravings, daytime energy crashes, and brain fog.
Physical clues: increasing waist size, difficulty losing weight, skin tags, and darkened skin folds (acanthosis nigricans).
Cardio-metabolic markers: high blood pressure, high triglycerides with low HDL, and fatty liver often appear before glucose abnormalities.
A fasting insulin test and HOMA-IR (fasting glucose + fasting insulin) detect insulin resistance earlier than fasting glucose or HbA1c alone.
The pancreas compensates by producing extra insulin so glucose stays normal for years; elevated insulin masks the underlying resistance until compensation fails.
Multiple skin tags and darkened, velvety skin folds (acanthosis nigricans), especially on the neck or armpits, are classic physical signs.
A fasting insulin test — and the combined HOMA-IR score (fasting insulin plus fasting glucose) — reveals elevated insulin and early resistance.
Calculate waist-to-height ratio (waist at belly button ÷ height). A ratio above ~0.5 indicates excess central fat and higher metabolic risk.
Eat higher-fiber, higher-protein meals, cut refined carbs, cook more whole-food meals, and try short walks (e.g., 10 minutes) after eating to boost glucose uptake.
"Insulin resistance affects the majority of adults in the modern western world, even if blood sugar tests appear normal."
Insulin resistance is a condition where the body's cells struggle to respond to insulin, a hormone that helps regulate blood sugar levels. This can occur even when blood sugar levels appear normal.
It is important to recognize that insulin resistance can affect anyone, not just individuals with diabetes. In fact, many people may be unknowingly on the path to type 2 diabetes due to insulin resistance.
The development of insulin resistance can take years or even decades, often going unnoticed until blood sugar levels become abnormal. The underlying metabolic issues usually occur long before a diagnosis is made.
"Most people never see the warning signs of insulin resistance coming, primarily because they are not aware of what to look out for."
Recognizing the signs of insulin resistance early is crucial, as damages to various bodily systems can begin long before a diabetes diagnosis is made.
When insulin resistance worsens, it begins to impact blood vessels, the liver, the brain, the kidneys, and metabolism, highlighting the importance of identifying symptoms before they escalate into more significant health issues.
A normal blood sugar reading does not guarantee metabolic health, underscoring the need for awareness regarding symptoms of insulin resistance.
"Feeling hungry again soon after eating could indicate insulin resistance."
Experiencing hunger soon after having a meal can be a sign of insulin resistance, especially if this pattern occurs repeatedly. The phenomenon stems from the rapid drop in blood sugar that follows a meal high in refined carbohydrates or sugars.
When insulin shoots up quickly in response to high sugar intake, but the body's cells are resistant, glucose fails to enter the cells effectively. This results in a significant drop in blood sugar, causing an urgent hunger response from the brain.
"Compulsive cravings for carbohydrates and sugars often reflect swings in blood sugar levels due to insulin resistance."
Insulin resistance often leads to compulsive cravings for sugary and starchy foods. This could manifest as an intense desire for bread, sweets, or any refined carbohydrate.
These cravings are linked to fluctuating blood sugar levels, where quick spikes and subsequent drops create a cycle of hunger. Consuming carbohydrates leads to spikes in blood sugar and insulin, followed by crashes that trigger further cravings, perpetuating the cycle.
"Feeling excessively tired after eating is a common metabolic sign of insulin resistance."
Experiencing energy crashes after meals is often misunderstood as simply being overworked or needing coffee, but it can indicate underlying metabolic issues.
After eating, a surge of insulin leads to a subsequent drop in blood sugar levels, which may leave the body without adequate fuel. This can result in fatigue and difficulty maintaining energy throughout the day.
"Difficulty concentrating or experiencing brain fog can be a sign that your metabolism is not functioning optimally."
Many individuals describe having trouble focusing or feeling mentally sluggish, especially after consuming a meal high in carbohydrates, which signals possible insulin resistance.
The brain, a highly metabolically active organ, requires stable glucose levels to function effectively. Resistance to insulin can disrupt this stability, leading to cognitive issues and affecting overall brain health. Some researchers associate this decline with diseases such as Alzheimer's, coining it "type 3 diabetes."
"A quick way to check this at home is to measure your waist to height ratio."
"Insulin is fundamentally a fat storage hormone."
"The best way to achieve a goal is to become interested in cooking and making colorful meals."
"Skin tags are commonly associated with insulin resistance."
"Acanthosis nigricans is a direct physical response to chronically elevated insulin."
"Insulin resistance affects the cardiovascular system in many ways."
"The classic picture here is high triglycerides and low HDL."
"Pre-diabetes is one of the most reversible points on this spectrum."
"Fatty liver disease can progress to inflammation, scarring, and liver failure."
"Increasing fiber and protein in your meals can make a massive difference."
"Having one of these signs doesn't mean that you're definitely insulin resistant, but having several of them together is really worth taking seriously."
Insulin resistance may not present obvious symptoms, making it crucial to be aware of multiple signs in combination, particularly physical signs and symptoms.
Standard testing conducted by most general practitioners typically measures fasting glucose and HbA1c, which primarily assess blood sugar levels.
"What those standard tests don't measure is the pressure itself."
These standard tests do not evaluate the actual insulin levels in the blood, thus missing the underlying issue of insulin resistance despite normal blood sugar readings.
Although blood sugar can remain normal, insulin levels may be elevated, indicating the body’s effort to maintain that norm, which is indicative of insulin resistance.
"A fasting insulin test measures the actual level of insulin in your blood after an overnight fast."
A fasting insulin test is essential for assessing insulin function, as it reveals insulin levels when the body is at rest.
High insulin levels, alongside normal blood glucose, are a clear indicator that insulin resistance exists.
"Homer uses both your fasting glucose and your fasting insulin together to calculate a score that determines how insulin resistant you actually are."
The Homer IR test combines fasting insulin and glucose readings to provide a more sensitive marker of insulin resistance than glucose or HbA1c alone.
This test may not be routinely offered by doctors but can be obtained privately from various laboratories.
"This honestly really is one of the most useful things that you can do if you want to understand what's actually happening in your metabolism."
Obtaining a fasting insulin test can give vital insights into metabolic health before issues become apparent in standard tests.
Searching online can help locate labs that offer fasting insulin testing in your area, enabling proactive health management.