Top News

Not everything you’ve heard about insulin resistance is true. These popular misconceptions deserve a closer look.

Reviewed by Dietitian Lisa Valente, M.S., RD

Key Points

• Insulin resistance is not the same as diabetes, but does impact blood sugar and health.
• Risks for insulin resistance include age, other health conditions, weight and more.
• Combining nutrition with lifestyle habits including activity and sleep can help.

The amount of nutrition misinformation circulating online these days can feel overwhelming. While it’s important to stay informed about health headlines, it’s just as essential to separate fact from fiction. That’s especially true for a topic that continues to dominate the conversation: insulin resistance.

First, a key distinction: insulin resistance is not the same as diabetes, though it can raise your risk of developing it. “Insulin resistance occurs when muscle, fat and liver cells don’t respond properly to insulin, prompting the body to produce more to keep blood sugar levels in a healthy range,” explains certified diabetes expert Erin Palinski-Wade, RD, CDCES. It’s important to be aware of this condition because if left untreated it can lead to elevated blood sugar and increase one’s risk for developing prediabetes, type 2 diabetes and other metabolic conditions.

With so much conflicting information out there, we looked to experts to help cut through the noise. Here are four common myths about insulin resistance and what to focus on instead to help lower your risk.

1. Myth: Insulin resistance only happens if you’re overweight

Weight stigma runs deep in the United States, especially when it comes to conditions such as insulin resistance. While it’s true, insulin resistance is typically an acquired condition to excess body fat, it’s not the only factor involved in its development. Palinski-Wade writes, “Insulin resistance isn’t limited to people at a certain weight. Research shows it can occur across all BMI levels, and measures like waist circumference tend to correlate just as closely. So while excess weight can increase risk, it isn’t the only cause.”

A range of other factors can also influence the development of insulin resistance. These include certain medical conditions, such as polycystic ovary syndrome, as well as age (risk tends to increase after 40), genetics and family history of conditions like cardiovascular disease, diabetes or hypertension.1 While this isn’t a complete list, it highlights that insulin resistance is multifactorial and not determined by weight alone.

2. Myth: Insulin resistance is the same as diabetes

To clear up this misconception, it helps to revisit what insulin resistance actually means. Insulin resistance occurs when your body’s cells don’t respond properly to insulin, the hormone responsible for helping regulate blood sugar. As a result, your body has to produce more insulin to keep blood sugar levels in a healthy range. Over time, this strain can lead to persistently elevated blood sugar.

If meaningful diet and lifestyle changes aren’t made, insulin resistance can gradually progress to type 2 diabetes, often over the course of 10 to 15 years. As Palinski-Wade explains, “Insulin resistance typically develops first and can exist for years without obvious symptoms before progressing to prediabetes or type 2 diabetes.”

3. Myth: You need to avoid carbs to reduce insulin resistance

One of the most persistent myths is that if your blood sugar is off, you need to cut out carbohydrates entirely, but that’s simply not true. “Carbs aren’t the enemy—the type and context matter,” explains diabetes expert Jess DeGore, RD, LDN, CDCES. “Highly processed carbs can spike blood sugar quickly, but fiber-rich options like beans, whole grains and vegetables can actually support better blood sugar control. Pairing carbs with protein and fat can also help minimize spikes.”

Research backs this up. Evidence suggests that dietary fiber, a type of complex carbohydrate, may help lower the risk of developing insulin resistance., Remember, fiber-filled foods take longer to digest, meaning there’s a less significant impact on your blood sugars when you consume more high-fiber foods. While nutrition is nuanced and foods provide more than just a single nutrient, it’s important to focus on overall dietary patterns rather than villanizing one food or macronutrient when it comes to long-term metabolic health. The type of carbohydrate and the amount you eat matters, but eliminating all carbs isn’t necessary for better blood sugar.

4. Myth: There’s a “magic” food or supplement that can fix insulin resistance

Scroll through social media and you’re bound to see ads promising that a single supplement or “miracle” product can fix your blood sugar or even reverse insulin resistance, but it’s not that simple. “No single food, drink or supplement can reverse insulin resistance on its own,” says DeGore. “While certain foods can support better blood sugar control, meaningful improvement comes from balanced meals, regular movement, quality sleep and an overall healthy lifestyle—not quick fixes.”

That said, medications can play a role when used alongside these habits. For example, metformin, commonly prescribed to help manage diabetes, may improve insulin sensitivity in some cases., GLP-1 medications may also be used to support weight management, which can, in turn, help improve insulin resistance. The bottom line: it’s a combination of strategies working together, not one magic solution.

Science-Backed Tips to Prevent Insulin Resistance

The bright side? There are research-backed strategies you can implement today to help prevent insulin resistance. Consider adding one (or more) of these into your everyday routine to support better blood sugar balance.

• Make everyday movement a priority. “Regular physical activity including both aerobic and resistance training, can improve insulin sensitivity. Movement helps your muscles take up glucose more efficiently and improves how your body responds to insulin overall,” shares Palinski-Wade. And you don’t have to train for a marathon to see these benefits. Even just a short walk after meals can help improve insulin sensitivity and promote better blood sugars.
• Focus on eating a high-fiber diet. Research shows that increasing fiber from whole foods, such as oats, which are rich in beta-glucan, as well as vegetables and legumes that provide both soluble and insoluble fiber, can help improve insulin sensitivity. As Palinski-Wade notes, these benefits may occur “even without significant weight loss in many cases.”
• Make adequate sleep a non-negotiable part of your routine. Both DeGore and Palinski-Wade encourage clients to log more zzz’s in the name of better insulin management. Poor sleep can lead to a cascade of health problems, including insulin resistance. Plus, the mental exhaustion that weighs on you while trying to complete everyday tasks from insufficient sleep can make choosing nutritious choices at meals more challenging and in turn affect your body’s blood sugar management.
• Consider weight-loss through building healthy habits. Smart, sustainable weight loss efforts can also help with insulin resistance. Palinski-Wade writes, “Even small changes in weight can impact insulin resistance. Losing just 5–10% of body weight through calorie reduction can decrease liver fat and lower insulin demand.”

Our Expert Take

There’s a lot of confusion when it comes to blood sugar and metabolic health, and not everything you read is accurate. Diabetes nutrition experts encourage consumers to be cautious of attention-grabbing headlines and to remember that insulin resistance is influenced by multiple factors, not just body weight.

It’s also important to note that insulin resistance is not the same as diabetes, and carbohydrates don’t need to be eliminated in order to support better blood sugar management. Instead, sustainable strategies make the biggest difference in lowering risk, such as increasing fiber intake, prioritizing regular physical activity, and supporting adequate sleep. While weight loss can be beneficial for some individuals, it often follows improvements in these foundational habits rather than focusing solely on the number on the scale. Over time, small, consistent changes can add up to meaningful results.